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Read the complete plot summary and ending explained for Thittam Irandu (2021). From turning points to emotional moments, uncover what really happened and why it matters.
Athira, a diligent police officer based in Chennai, finds her personal life intersecting with a high-stakes investigation when she crosses paths with a charming, aspiring actor on a routine bus ride. Their chance meeting blossoms into a relationship, and the couple starts envisioning a future together, even planning a wedding as life moves forward with both passion and duty tugging in different directions. Yet the calm ahead is unsettled by a troubling case that pulls Athira away from her private happiness and into a web of secrets, lies, and a twist that tests every faith she has in what she believes she knows.
Her best friend, Deepa Surya, vanishes under mysterious circumstances, a disappearance that unfolds against the backdrop of a troubled marriage to Kishore, a well-placed doctor. The initial clues hint that Deepa Surya, and the car she was driving, disappeared from her own doorstep. As Athira delves deeper, she uncovers a burnt-out car and a scorched human remains hidden inside—a grim find that the autopsy initially labels as belonging to Deepa Surya. The diagnosis appears to seal the case as a freak accident, yet Athira does not buy the conclusion. Something about the scene—its fragility, the scorching heat, and the possibility of someone manipulating the evidence—tells her this is more than a random misfortune.
The trail quickly grows more complex when Athira discovers fingerprints on the burnt car that point to Barani, a man connected to another murder case that bears eerie similarities. Barani, now in custody, confesses a chilling motive: Deepa Surya and another woman had ruined his life by mismanaging his trust and affecting his ambitions, and he sought revenge. He concedes that he did indeed kill the other woman, though the attempt on Deepa Surya’s life was not as straightforward as it seemed; a mysterious stranger in her house that day foiled the plan, leaving Barani with the impression that someone else had intervened. The scene grows murkier as he notes that his fingerprints had been left during a scuffle with that unseen figure, a figure who vanished into the shadows of the night.
Amid wedding preparations and a growing sense of unease, Athira remains enveloped in the case that haunts her. Her focus sharpens as new evidence surfaces and she reexamines Deepa Surya’s corpse with fresh eyes. The plot takes a bizarre and unsettling turn when the pathologist’s report comes in, stating that the victim is not Deepa Surya after all. The entire accident appears staged, and the chronology painted by the earlier autopsy reports seems to be a fabrication. With this revelation, Athira’s suspicions swing decisively toward Kishore, the husband who once spoke of love but now stands at the crossroads of truth and deception.
Kishore offers a startling account of what happened. He claims that Deepa Surya was forced into marriage by her parents, despite her love for someone else. In a bid to give her a chance at happiness, Kishore allegedly sent Deepa Surya away to be with her lover and, to avoid arousing suspicion, orchestrated a fake death with the help of his friends. He asserts that his influence as a doctor allowed him to manipulate autopsy and investigative narratives, and he even shows Athira a video purportedly capturing Deepa Surya living with her boyfriend, though he refuses to disclose their location, citing safety concerns. The tension mounts as Athira weighs the weight of this new testimony against the mounting questions in her own life.
To verify Kishore’s story, Athira brings the video to Barani, the man behind the earlier fingerprint clue. Barani’s response complicates matters: he declares that the man in the video does not match the figure he saw during the original encounter at Deepa Surya’s house, which throws the whole scenario into doubt. The mystery widens as Athira discovers that the mysterious man Barani encountered was not someone else at all, but Arjun—an unexpected figure who did not appear in the original narrative she was following. The revelation casts doubt on many prior assumptions and pushes Athira to search for more truth instead of settling for convenient explanations.
As tension escalates, Athira receives a text from Deepa Surya herself, asking to meet in person. She heads to the meeting place with Arjun as her companion, only to find that Deepa Surya is not present. In a tense confrontation, Kishore and a circle of mutual friends confront Athira, adding a sudden surge of danger to the investigation. In the midst of the chaos, Barani comes across YouTube videos of Arjun from his acting days and identifies him as the man Barani saw at the house. The pieces begin to align in a way that forces Athira to confront a truth she never anticipated: Arjun is connected to Deepa Surya in ways that blur the lines between identity, love, and deception.
What follows is a revelation that shakes the very foundation of the case and Athira’s understanding of the people she trusted. Arjun, he reveals, is none other than Deepa Surya herself. Kishore adds the deeper context: Deepa Surya was always a transgender man who had long desired to live as a man, a truth she felt compelled to conceal due to family expectations and social pressures. From childhood, she struggled with her identity and, despite loving women, she yearned to become a man. After her marriage to Kishore, Deepa Surya shared the truth with him, expressing a wish to live openly as a man. Kishore’s compassionate response put him at odds with the world’s judgments, and he offered his support to help her transform, even warding off Barani’s advances because he understood the intricate feelings at stake.
As the transformation unfolds, the reality behind the staged accident is laid bare: Deepa Surya’s desire to become Arjun is the silent motive behind the deception, with the shield of a fake death and manipulated reports masking her true journey. Arjun steps forward, confessing his love for Athira and presenting a future where he hopes to be accepted as a man. Athira is overwhelmed by the magnitude of the truth and the emotional weight of the confession. She leaves, struggling to process the news, and chooses to cut off contact with Arjun while she tries to decide what her life should look like in light of this new reality.
A year passes, and the story closes on a suspended note. Athira finally reconnects with Arjun, meeting him again with a decision to make about their future, but the film leaves viewers hanging, inviting them to ponder whether love, identity, and truth can converge in a single, lasting moment. The case, the relationships, and the courage to live authentically collide in a way that asks more questions than it answers, and it remains unclear what path Athira will choose as she contemplates a life that now includes a person she believed to be one thing but who is, in truth, another.
This intricate tale animates a meditation on love, identity, and the costs of truth, all set against a backdrop of a bustling city where every clue can bend the narrative, and every revelation can redefine what it means to be loved and accepted for who you truly are.
Follow the complete movie timeline of Thittam Irandu (2021) with every major event in chronological order. Great for understanding complex plots and story progression.
Meeting on a bus sparks a budding romance
Athira, a Chennai cop, meets Arjun during a bus ride and feels an instant connection. They begin a relationship and soon decide to marry after some time.
Love blooming and plans to marry
The pair grows closer as their relationship deepens. They start talking about a future together and decide to marry after a period of dating.
Missing friend leads to a homicide investigation
Athira is drawn into the disappearance of her best friend, Deepa Surya, who was married to Kishore. Surya's car is missing, and a burnt car with a burnt female skeleton is found, kicking off the investigation.
Initial autopsy points to a freak accident
The autopsy initially identifies the skeleton as Surya and suggests a freak accident. Athira remains unconvinced and suspects foul play may be involved.
Barani's fingerprints surface as a clue
Athira discovers Barani's fingerprints on Surya's burnt car, linking him to the case and tying him to another murder investigation. The evidence deepens the mystery surrounding Surya's death.
Barani confesses motive and the stranger
Barani admits that Surya and another murdered woman were his ex-girlfriends and that revenge was his motive. He claims a stranger in Surya's house thwarted his attack, and his fingerprints were left during a scuffle.
Wedding plans amid rising suspicions
While Athira and Arjun's wedding plans progress, Athira remains preoccupied with Surya's case. New evidence prompts reexamination of Surya's corpse and the earlier conclusions.
The corpse reveal: not Surya, the accident staged
Pathologists reveal that the victim is not Surya and that the accident was staged. The revelation exposes the earlier autopsy reports as fake, intensifying the mystery.
Kishore's account of a staged death
Kishore explains that Surya was forcibly married to him but loved another person. He orchestrated Surya's 'death' with friends and manipulated autopsy reports to protect the truth, showing Athira video proof of Surya living with her boyfriend but withholding their location.
Barani challenges the video, points to Arjun
Athira shows Barani the video of Surya with her boyfriend, but Barani says the man he saw in Surya's house is not the same as in the video. This contradiction points to the mysterious man being someone else, sharpening the plot.
Arjun reveals a shocking truth about his identity
Arjun reveals that he is actually Surya, a transgender man who loves Athira. Kishore explains the deeper history: Surya was always transgender and transformed into Arjun with support, a revelation that reframes everything.
The confession of love and a painful decision
Arjun asks Athira to accept his love as a man. Overwhelmed by the magnitude of the truth, she struggles and ultimately leaves without giving him an answer.
A year later, a stalled proposal
One year later, Athira and Arjun meet again, and she arrives with an answer to his proposal. The film ends on a note of uncertainty, leaving their future unresolved.
Explore all characters from Thittam Irandu (2021). Get detailed profiles with their roles, arcs, and key relationships explained.
Athira - Aishwarya Rajesh
A determined Chennai police officer who relentlessly pursues the truth behind her best friend Deepa Surya's disappearance. She balances professional duty with personal turmoil as her wedding to Arjun approaches and the case grows increasingly complex.
Arjun - Subash Selvam
An aspiring actor whose relationship with Athira is tested by a web of secrets. He is caught in a mystery that reveals his own hidden identity and the broader truth about Surya's past and present.
Kishore - Gokul Anand
A doctor who appears to orchestrate Surya's supposed death, yet ultimately supports Surya's transformation into a man. He acts as a pivotal ally who defies social expectations while safeguarding the truth.
Barani - Pavel Navageethan
A vengeful former lover whose crimes set off a chain of investigations. He embodies the darker side of obsession and pride, and his testimony drives the plot toward a destabilizing revelation.
Deepa Surya - Ananya Ramaprasad
Best friend of Athira and the central figure in the early case who later becomes part of a larger truth about Surya's life. Her disappearance triggers the initial investigation and a sequence of surprising twists.
Learn where and when Thittam Irandu (2021) takes place. Explore the film’s settings, era, and how they shape the narrative.
Time period
Present day (early 2020s)
The story unfolds in contemporary Chennai, with characters relying on current technologies and media. The timeline covers investigations, a wedding, and a major revelation that shifts the narrative. The era reflects modern policing, urban life, and the public's interest in identity and personal truth.
Location
Chennai
Chennai is a sprawling coastal metropolis in Tamil Nadu known for its bustling districts, traffic, and rich culture. The city serves as the backdrop for a police investigation that threads through its neighborhoods and busy streets. Its modern urban atmosphere contrasts with social tensions around identity, relationships, and justice that drive the plot.
Discover the main themes in Thittam Irandu (2021). Analyze the deeper meanings, emotional layers, and social commentary behind the film.
🏳️⚧️
Identity
A central thread follows Surya's transformation into Arjun, highlighting the journey from secrecy to self-acceptance. The narrative examines how gender identity intersects with love and friendship, testing loyalties. It challenges social norms by presenting a fluid sense of self at the heart of a crime mystery.
💖
Love and Acceptance
Romantic and platonic relationships are strained as truths emerge about who Surya/Arjun really is. Athira's feelings and choices are tested when identity and past loyalties collide. The film probes whether love can endure deception or requires accepting a new truth.
🔎
Mystery
A murder investigation reveals staged accidents, fake autopsies, and shifting identities. Clues point to Barani and a stranger, then circle back to Arjun's true identity. The revelation reframes every motive and forces the characters to confront what they believed about trust and truth.

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Discover the spoiler-free summary of Thittam Irandu (2021). Get a concise overview without any spoilers.
In the vibrant streets of Chennai, the rhythm of everyday life masks a simmering undercurrent of uncertainty. Athira, a determined young police officer, navigates the demands of her badge while dreaming of a future beyond the precinct. Her world takes on a softer hue when she meets Arjun, an aspiring actor whose charm and ambition promise a shared path, and the two soon find themselves planning a life together amid the city’s relentless pulse.
The fragile balance of Athira’s personal happiness is shaken when she is called to investigate the sudden disappearance of her closest confidante, Surya. What begins as a routine missing‑person case quickly unfurls into a labyrinth of unanswered questions, pulling Athira into a sphere where professional duty collides with intimate loyalty. The investigation forces her to confront the hidden layers of her friend’s life and the unsettling possibility that nothing is as straightforward as it first appeared.
As clues surface, the film deepens its mood of quiet tension, blending the procedural cadence of a police drama with the emotional resonance of a personal journey. Athira’s relationship with Arjun becomes a delicate counterpoint to the growing mystery, each interaction tinged with the weight of unspoken concerns. Meanwhile, the presence of Kishore, a figure from Surya’s past, adds another thread of complexity, hinting at the ways family and societal expectations can shape, and sometimes obscure, truth.
Against this richly textured backdrop, Athira must decide how far she is willing to go to untangle the knot of secrets surrounding the people she loves. The story invites viewers to linger on the nuanced interplay of identity, friendship, and the relentless pursuit of answers, leaving the outcome as compellingly open as the city’s own endless horizon.
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