What Is Detective Conan: One-Eyed Flashback About?
The premise of Detective Conan: One-Eyed Flashback in 308 words, with nothing given away. The full story follows below.
In the icy reaches of Nagano’s remote peaks, a single mis‑step can turn a routine chase into a life‑threatening ordeal. Ten months after a harrowing pursuit left a police inspector gravely injured by a stray bullet and caught in an avalanche, the quiet of the mountains is broken once more by a mysterious attack on a researcher at the Nobeyama National Astronomical Observatory. The incident reawakens a cold case that has lingered unseen, pulling the inspector back into a web of unanswered questions and lingering danger.
Yamato Kansuke returns to the scene haunted by the memory‑less aftermath of his own near‑fatal experience. His determination is matched by the steadfast curiosity of Kogoro Mouri, a celebrated detective whose own past connections to the original pursuit add an extra layer of personal stakes. Alongside them, the brilliant young sleuth Conan Edogawa offers his unparalleled deductive talent, turning ordinary clues into threads that could untangle the mystery. The snowy landscape itself becomes a silent character, its relentless cold and looming avalanches echoing the precarious balance between truth and concealment.
The film’s tone blends the stark, breath‑stealing beauty of winter with the tense rhythm of a procedural investigation. Every exchange is tinged with an undercurrent of unease, as seasoned officers and sharp‑minded amateurs navigate a world where official reports hide deeper currents of intrigue. The observatory’s scientific aura juxtaposes the cold, methodical precision of law enforcement, hinting at hidden layers of secrecy that linger just beyond the visible horizon.
As the investigation unfolds, the characters must confront not only the physical hazards of the mountains but also the lingering shadows of past decisions. Trust, memory, and the relentless pursuit of justice intertwine, setting the stage for a story where every whispered wind across the snow‑capped peaks could be a clue, and every lingering silence might hold the key to an unresolved truth.
What Happens in Detective Conan: One-Eyed Flashback?
The complete story of Detective Conan: One-Eyed Flashback, from the first scene to the last, in 737 words (about 3 minutes). Spoilers throughout. Names in the text link to 6 cast member pages.
Spoilers ahead
On a cold and remote mountain range in Yatsugatake, a complex and dangerous sequence of events unfolds that ties together crime, espionage, and personal tragedy. The story begins approximately ten months prior, with an intense pursuit involving Inspector Yamato Kansuke, played by Wataru Takagi, who is investigating Sadakuni Mikuriya, a suspect linked to a gun store robbery from eight years earlier. During this chase, Kansuke is shot near his left eye and later caught in a devastating avalanche. Although rescue efforts save him, the incident leaves him injured and with no memory of what happened that day.
Fast forward to the present, the narrative deepens with the investigation of a break-in at the Nobeyama radio observatory. Concurrently, the famous detective Kogoro Mouri, voiced by Rikiya Koyama, is contacted by Koji Sametani, a former colleague from his police days. They discuss the avalanche and the pursuit, which reignites Kogoro’s curiosity and sense of justice. When they arrange to meet, tragedy strikes: Sametani is unexpectedly shot and killed, leaving Kogoro deeply affected and determined to uncover the truth. Joined by Detectives Sato and Takagi, Kogoro ventures to Nagano, where they begin piecing together the mysterious events.
In Nagano, they meet with several key figures, including Yui Uehara, a fellow detective with a keen sense of duty played by Ami Koshimizu, Eizo Funakubo, the father of Maki Funakubo, a former biathlete who committed suicide following her injury, and the police officials involved in the case. The investigation reveals that Koji Sametani had previously visited Sadakuni, who was later sentenced to prison due to a plea bargain with suspect Takashi Washizu, who subsequently escaped from custody. The story takes an even more intriguing turn with the involvement of Yuya Kazami, an officer from the Public Security Bureau, hinting at broader covert operations. Conan Edogawa, the young detective with a sharp mind played by Minami Takayama, deduces that this case might involve undercover agents working within multiple agencies, especially pointing to Hayashi Atsunobu, played by Wataru Hatano, who is revealed to be an undercover PSB agent.
That very night, Yui Uehara and Kansuke are ambushed amid their efforts to track down the shooter. Thanks to the quick thinking of Mitsuhiko Tsuburaya, Genta Kojima, and Ran Mouri, they manage to fend off the attacker, but the danger persists. The police find shelter in Takashi Otomo’s hut, where they face yet another ambush. During this tense moment, Morofushi plunges into icy waters to shield Kansuke and is later rescued. Meanwhile, Conan uncovers a chilling scheme: the suspect had attempted to use Otomo’s equipment to trigger an avalanche, aiming to bury everyone. Despite efforts to counteract the avalanche, Kansuke is tragically reported dead, a loss that hits everyone hard.
In a startling revelation at the Nobeyama Observatory, it is uncovered that the gunshot incident was perpetrated by Detective Hayashi. Hayashi, driven by personal motives—including his love for Maki who resented Mikuriya and Takashi for her death—opposes the new law strengthening plea bargain procedures. He opposed Sametani’s work, killing him to cover his tracks, and attempted to eliminate Kansuke before he could reveal incriminating information. Hayashi also exploited the observatory’s antenna to intercept military satellite intelligence, using the data to coerce the Japanese government into suspending legislative progress.
As the story reaches its climax, Kazunobu Shiratori, a Prosecutor played by Chafurin, and other police officers work together to capture Hayashi. It is then unveiled that Yamato Kansuke’s apparent death was part of an elaborate plan to protect him, which was facilitated with assistance from Yuya Kazami. In the end, Hayashi is arrested, but in the post-credit scene, Furuya, also known as Rei Furuya, appears before Hayashi and offers him a plea bargain: a reduced sentence in exchange for silence about the involvement of the Public Security Bureau. This offer enrages Hayashi, who is aware that exposing the bureau would also reveal his connection to Maki, risking his reputation and personal safety.
Meanwhile, the police in Nagano reflect on the case. Yui Uehara notes that Conan has already informed her that Kansuke is alive, providing a glimmer of hope. Morofushi views Conan’s concern for Yui as a sign of his growing empathy, while Yui suggests that Conan’s reactions might be beyond simple professional responsibility, hinting at his deeper understanding.
This story intertwines the themes of justice, personal sacrifice, and the shadowy world of espionage, revealing how both the truth and deception often lie beneath icy mountain peaks.
Detective Conan: One-Eyed Flashback Timeline: Every Key Event in Order
14 key events in the order they happen, from “Yatsugatake Mountain Pursuit” to “Police Reflection and Status”. 14 events name a place, across 6 locations.
- 1
Yatsugatake Mountain Pursuit
Ten months ago at the Yatsugatake mountain range, Inspector Yamato Kansuke was shot near his left eye while pursuing Mikuriya Sadakuni, a suspect in an old gun store robbery case. The incident occurred during a police chase, leading to Yamato being caught in an avalanche, which he miraculously survived despite injuries and memory loss. This event sets the stage for the unfolding mystery surrounding the case.
When:Ten months ago Where:Yatsugatake mountain range
- 2
Yamato Rescued from Avalanche
Following the avalanche, Yamato Kansuke is rescued but suffers injuries, including damage to his left eye. He retains partial amnesia about the incident, which hampers his recollection of the events that transpired during the chase. This injury and memory loss impact his ability to pursue the case further.
When:Ten months ago Where:Yatsugatake mountain range
- 3
Current Investigation of Nobeyama Break-in
In the present day, Yamato and Detective Yui Uehara investigate a break-in at the Nobeyama radio observatory. This event is part of the larger series of incidents linked to the ongoing investigation into the crimes connected to the initial robbery case and the mysterious activities involving high-tech intelligence.
When:Present day Where:Nobeyama radio observatory
- 4
Meeting with Koji Sametani
Kogoro is contacted by his former police colleague Koji Sametani, who shows interest in meeting Kogoro in person. During their meeting, Sametani is unexpectedly shot and killed, which intensifies the investigation and raises suspicions about the involvement of undercover agents.
When:Present day Where:Meeting location (unspecified)
- 5
Kogoro and Police Search for Clues
Kogoro joins detectives Sato and Takagi in Nagano to uncover more clues about the murder of Sametani and the ongoing case. Their investigation reveals links between the suspects, including connections to past crimes and undercover operations.
When:Present day Where:Nagano
- 6
Meeting with Kansuke and Yui
In Nagano, the police meet with Yamato Kansuke and Yui Uehara, along with other officers, to discuss recent ambush attempts and the suspicious activities in the mountain range. These encounters highlight the dangerous environment and ongoing threats faced by the investigators.
When:Present day Where:Nagano
- 7
Discovery of Maki Funakubo's Past
Police uncover that Maki Funakubo, a former biathlete, committed suicide after injuries sustained during the robbery incident. Her father, Eizo Funakubo, is interviewed, exposing personal stakes and the tragic consequences of the case.
When:Present day Where:Nagano
- 8
Uncovering Undercover Agents
Conan deduces that some police officers, including Hayashi Atsunobu, are undercover agents for the Public Security Bureau, involved in covert operations. Tensions rise as the investigation points toward espionage and manipulation within the police force.
When:Present day Where:Nagano
- 9
Ambushes and Avalanche Attacks
Yui, Kansuke, and other officers are ambushed multiple times on the mountain. Morofushi plunges into freezing water trying to protect Kansuke, and an avalanche is triggered during the chaos. Kansuke is reported dead after being unable to find shelter in time.
When:Following night and dawn Where:Yatsugatake mountain range
- 10
Revelation of Takashi Washizu's Identity
It is revealed that Takashi Otomo is actually Takashi Washizu, the escaped suspect from the robbery case who was believed to be dead. His involvement is linked to the attempts to manipulate the criminal investigation using dangerous devices.
When:During the investigation Where:Nagano
Show the other 4 events of Detective Conan: One-Eyed Flashback Hide the last 4 events
- 11
The Culprit Identified as Detective Hayashi
The investigation reveals that Detective Hayashi is the shooter responsible for the incidents. He resents Mikuriya Sadakuni and others for causing Maki Funakubo's death, and he used the observatory's antenna to intercept military signals to influence governmental decisions.
When:Present day Where:Nobeyama Observatory
- 12
Hayashi's Capture and Confrontation
Hayashi attempts to escape but is captured after a coordinated effort involving Conan, Ai, Professor Yutaka Ochi, and police officers. The confrontation exposes his motives and the extent of his underworld activities.
When:Present day Where:Nobeyama Observatory
- 13
Post-Credit Scene - Hayashi's Plea Bargain
In the post-credit scene, Furuya offers Hayashi a plea bargain, reducing his death penalty to life imprisonment in exchange for staying silent about the PSB's involvement. Hayashi is enraged but faces a dilemma of exposing the truth versus saving himself.
When:After the main events Where:Unspecified
- 14
Police Reflection and Status
The Nagano Police discuss Yamato's survival, with Yui noting Conan's prior knowledge of Kansuke being alive. They reflect on the complex web of operations, espionage, and the emotional toll on the officers involved in the high-stakes case.
When:After the resolution Where:Nagano
Who Are the Main Characters in Detective Conan: One-Eyed Flashback?
3 characters, among them Kogoro Mouri, Yui Uehara and Hayashi Atsunobu: who each one is and the part they play in the story.
- KM
Kogoro Mouri
A seasoned detective known for his sharp deductive skills. He is deeply involved in solving the mountain incident and seeking justice for the victims. His analytical approach and protective nature drive much of the investigation.
- 👮♂️ Detective
- 🎩 Sleuth
- 💪 Strong-willed
- YU
Yui Uehara
A detective who specializes in undercover work and investigations involving the PSB. She is dedicated and resourceful, playing a key role in unraveling the conspiracy behind the incidents.
- 🕵️♀️ Undercover
- 🔍 Investigator
- 💼 Professional
- HA
Hayashi Atsunobu
An undercover officer involved in intercepting military intelligence. His actions and motivations are central to the conspiracy, and his fate ties into the larger theme of espionage and betrayal.
- 🕵️♂️ Spy
- 🧩 Conspirator
- 🔒 Confidential
Where and When Is Detective Conan: One-Eyed Flashback Set?
Detective Conan: One-Eyed Flashback is set in Yatsugatake mountain range, Nobeyama, Nagano Prefecture and Nobeyama radio… (Eight years ago and present day). Here is why the time and place matter to the story.
When
Eight years ago and present day
The story spans from eight years ago, during a robbery case and a subsequent avalanche incident, to the present day, where ongoing investigations reveal unresolved mysteries. The events unfold over a timeline that includes flashbacks and current investigations, highlighting the passage of time and evolving police work in Japan.
Where
Yatsugatake mountain range, Nobeyama, Nagano Prefecture, Nobeyama radio observatory
Yatsugatake mountain range is known for its alpine scenery and outdoor activities in Nagano Prefecture. Nobeyama houses a prominent radio observatory used for space and satellite research. These locations are characterized by rugged natural landscapes and scientific facilities nestled in rural Japan.
- 🏔️ Mountain
- 🔭 Observatory
- 🏞️ Scenic
- 🇯🇵 Rural Japan
What Are the Themes of Detective Conan: One-Eyed Flashback?
2 ideas the story keeps returning to, among them Mystery and Justice.
-
01
Mystery
The movie revolves around solving a complex series of crimes, including a shooting, a robbery, and an avalanche. Deductive reasoning and uncovering hidden truths are central to the plot, reflecting the theme of unraveling mysteries.
-
02
Justice
The story explores themes of legal procedures, plea bargains, and undercover justice. Characters grapple with moral dilemmas, and the pursuit of truth is intertwined with law enforcement efforts to maintain justice.
What Kind of Film Is Detective Conan: One-Eyed Flashback?
Tense in tone, with fast pacing and a complex story, going by the plot summary.
- Tone
- Tense
- Pacing
- Fast
- Story
- Complex
- Intensity
- High
- Ending
- Bittersweet
A fast-paced and tense investigative thriller set against a stark mountain backdrop, blending high-stakes action with melancholic personal stories of loss and betrayal.
- suspenseful
- anxious
- gripping
- melancholic
- cold
- dangerous
- crime investigation
- espionage
- personal sacrifice
- justice
Content notes: gun violence, suicide, faked death.
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