What Is Lost Souls About?
The premise of Lost Souls in 269 words, with nothing given away. The full story follows below.
In a quiet house that feels both sanctuary and echo of the past, two sisters grapple with the lingering presence of the woman who shaped them. Kaya, the older sibling, carries a steady, protective resolve, while Hannah balances curiosity with a fragile yearning for connection. Their mother’s sudden loss has left a void that haunts the rooms, whispering through the walls and lingering in the spaces between them.
The sisters’ shared grief draws them toward an uneasy comfort in the unknown. On a night shrouded in darkness, they decide to hold a séance, hoping to bridge the chasm between life and death and to hear a familiar voice once more. The ritual is steeped in the intimate rituals of family—candlelight, whispered memories, and a desperate desire to feel seen by the one they have lost.
As the evening unfolds, the house itself seems to respond, its atmosphere thickening with a weight that feels both familiar and unsettling. The tone of the story walks a thin line between tender remembrance and creeping dread, inviting the audience to sense how love and longing can open doors to forces beyond comprehension. The sisters’ dynamic—Kaya’s steadiness against Hannah’s more impulsive yearning—creates a compelling emotional core that anchors the unfolding tension.
What begins as a heartfelt attempt to reach out to a beloved mother subtly shifts the ordinary into the uncanny, suggesting that the boundaries between the living and the unseen are more porous than the sisters ever imagined. The film promises a haunting exploration of grief, connection, and the unforeseen consequences that can arise when we summon the past back into our present.
What Happens in Lost Souls?
The complete story of Lost Souls, from the first scene to the last, in 481 words (about 2 minutes). Spoilers throughout. Names in the text link to 2 cast member pages.
Spoilers ahead
Maya Larkin, Winona Ryder, is a devout Roman Catholic and a dedicated schoolteacher for a New York City diocese. She joins Father Lareaux, Father Jeremy, and John Townsend on a tense mission to a psychiatric clinic where they attempt to exorcise Henry Birdson, a man plagued by epileptic seizures and a disturbing compulsion to scribble a cryptic sequence of numbers. The ritual proves fruitless: Henry slips into a coma, and Father Lareaux appears weakened by the strain. In a bid to unravel the mystery, Maya discreetly smuggles out Henry’s notes and, using polyalphabetic substitution, deciphers the enigmatic digits to reveal the name Peter Kelson Ben Chaplin.
Across town, Peter Kelson—an author who covers serial killers, narcissism, and parapsychology—meets with his family during a quiet dinner. He recounts a recurring dream in which he is reading a book whose cover bears the letters “XES.” A later clue from a priest clarifies that this is the Greek number חез (χεζ), whose numerical value points to a chilling omen: the devil’s incarnation will cross paths with a man on the precise moment of his 33rd birthday.
As Maya digs deeper, she becomes convinced that Peter is the living embodiment of evil. She confronts him with a unsettling profile: a unique blood type, a stubborn disbelief in pure evil, and the startling fact that his infant baptism was performed not by clergy, but by a family member. Determined to prevent catastrophe, she persuades Peter to join in an exorcism, while simultaneously guiding him to look for a pentagram hidden under his bed and handing him the recording of Henry’s exorcism—only to find the tape in his apartment eerily silent. When Peter plays it, the supposed torment is not his alone: Henry’s screams echo from a neighboring apartment, and that resident is later found to have killed herself.
Peter soon shares the pentagram with his girlfriend Claire after discovering it in the false ceiling of the adjacent unit. Claire responds with fear and fury, pulling a gun and threatening Maya, insisting that Peter is being deceived. A violent struggle ensues, and a shot is fired that inadvertently kills Claire.
To pull off the exorcism that could save Peter, Maya and their circle turn to Father Lareaux. Yet Lareaux, tainted by the earlier exorcism, has themselves become possessed, and the exorcism is redirected to him—yielding his death. On his deathbed, Lareaux urges Peter and Maya to seek Peter’s uncle, Father James, who is conducting mass in a church populated by Peter’s extended family. The confrontation escalates as Peter shoots his uncle and two other relatives before fleeing with Maya.
The chase ends beneath a blocked bridge, where Peter, cornered by his fate, passes the gun to Maya. As the digital clock in their vehicle flips to 6:66 a.m., Peter completes his transformation into the human incarnation of Satan, and Maya, in a final act, shoots him dead.
Lost Souls Timeline: Every Key Event in Order
13 key events in the order they happen, from “Exorcism attempt at psychiatric clinic” to “Final confrontation under the bridge”. 13 events name a place, across 11 locations.
- 1
Exorcism attempt at psychiatric clinic
Maya Larkin accompanies Father Lareaux, Father Jeremy, and John Townsend to a psychiatric clinic to exorcise Henry Birdson. The ritual fails, leaving Henry in a coma and weakening Father Lareaux. The failed exorcism sets the stage for the unfolding events.
When:Opening sequence Where:Psychiatric clinic, New York City
- 2
Henry Birdson falls into a coma
Henry Birdson falls into a coma after the failed exorcism, and Father Lareaux is visibly weakened by the ordeal. The staff of the clinic are shaken, and the exorcism team regroups. The outcome raises a sense of looming danger.
When:Immediately after the exorcism Where:Psychiatric clinic
- 3
Maya decodes Henry's notes to reveal Peter Kelson
Maya smuggles Henry's notes out of the clinic and uses polyalphabetic substitution to decipher the coded numbers, uncovering the name Peter Kelson. This revelation prompts her to investigate Peter's identity more closely. The link between Henry and Peter becomes the central clue moving forward.
When:Shortly after the exorcism Where:Maya's home
- 4
TV reveals Peter Kelson's occupation and research
Maya learns from a television report that Peter Kelson is a writer who researches serial killers, narcissism, and parapsychology. The profile deepens the sense that Peter is connected to the sinister symbols surrounding Henry. The media presence adds credence to Maya's suspicions.
When:Soon after decoding Where:Maya's home
- 5
Peter meets his family at dinner
Peter meets his family for dinner and shares a repetitive dream in which he reads a book bearing the letters XES on the cover. The moment hints at a predestined thread connecting Peter to the occult prophecies around him. Dinner reveals a normal life masking a growing ominous tension.
When:During dinner Where:Peter's family home
- 6
The Greek code χεζ signals a 33rd birthday omen
One of the priests discovers that the book cover bears the Greek number χεζ. In its value 22 plus 5 plus 6, it indicates that the incarnation of the devil will meet a man in the minute of his 33rd birthday. The discovery heightens the sense of a predestined confrontation.
When:Evening Where:Exorcism planning setting
- 7
Maya confronts Peter and enlists him for the exorcism
Maya realizes Peter is the chosen personification of the devil and confronts him with evidence, including his unique blood type and baptism history, persuading him to participate in an exorcism. She also hands him the tape of Henry's exorcism. The conversation marks a turning point as Maya tries to recruit Peter into the fight against the demonic force.
When:Following the revelation Where:Peter's apartment
- 8
The exorcism tape goes silent; neighbor's tragedy
Peter plays the Henry exorcism tape, but it is silent; instead Henry's screams are heard from the neighbor's apartment, and the neighbor is later found to have killed herself. The eerie event underscores the permeability of boundaries between worlds. The moment heightens the sense that danger is escalating.
When:That same night Where:Peter's apartment
- 9
Pentagram revealed; Claire threatens Maya
Peter shows the pentagram to his girlfriend Claire after discovering it hidden in the false ceiling of the apartment below hers. Claire pulls a gun and threatens Maya, sparking a struggle that ends with Claire accidentally shot. The sequence intensifies the peril facing Maya and Peter.
When:Soon after the pentagram discovery Where:Claire's apartment building
- 10
Exorcism of Father Lareaux turns deadly
Maya and Peter reach out to Father Lareaux, who has become possessed since Henry's exorcism, and an exorcism is carried out on him, killing him in the process. The exorcism ritual exacts a fatal toll on the priest once again. The loss pushes the investigation toward the next step.
When:Shortly after Claire's death Where:Lareaux's location (likely a church)
Show the other 3 events of Lost Souls Hide the last 3 events
- 11
Lareaux directs them to Father James
Before dying, Lareaux tells Peter and Maya to seek Peter's uncle, Father James, who is celebrating Mass in a church with Peter's family. The message directs the protagonists toward a more intimate setting where the family is gathered. The narrative builds toward a climactic revelation.
When:Next Where:Church
- 12
Massacre at the church and escape
Peter shoots his uncle and two other members of his family during the Mass, then drives off with Maya in his car. The attack reveals the true extent of Peter's transformation and the danger he represents to those around him. The escape leads them toward a final confrontation.
When:Immediately after the Mass Where:Church and surrounding area
- 13
Final confrontation under the bridge
Peter stops his Land Rover under a blocked bridge and hands the gun to Maya. As the digital vehicle clock changes to 6:66 a.m., Peter transforms into the human incarnation of Satan and Maya shoots him dead. The confrontation resolves the long descent into darkness with a fatal final act.
When:6:66 a.m. Where:Road near a blocked bridge
Who Are the Main Characters in Lost Souls?
6 characters, among them Maya Larkin, Peter Kelson and Father Lareaux: who each one is and the part they play in the story. 2 of them link to the actor’s page.
-
Maya Larkin
Played by Winona Ryder
A devout Roman Catholic schoolteacher for a New York diocese who becomes the catalyst for the exorcism effort. She translates Henry's notes by polyalphabetic substitution and identifies Peter Kelson as the vessel of the devil. She drives the action, confronting Peter and pursuing the exorcism, ultimately shooting Peter when he transforms.
- 🕊️ Faithful
- ✝️ Compassionate
- 🔎 Investigative
-
Peter Kelson
Played by Ben Chaplin
A writer who researches serial killers and studies narcissism and parapsychology. He is revealed as the incarnation of the devil and initially doubts the existence of pure evil. His arc culminates in a confrontation where he is killed by Maya after his transformation.
- 🧠 Intellectual
- 🧪 Scientist
- 🔥 Dangerous
- FL
Father Lareaux
A priest who leads the exorcism effort; after Henry's exorcism, he becomes possessed and dies during the exorcism of Peter. His collapse underscores the peril that clergy face when confronting true supernatural force.
- 🙏 Devoted
- 🌀 Possessed
- 🕯️ Sacrificial
- C
Claire
Peter's girlfriend who becomes entangled in the mounting tension. She confronts Maya, pulls a gun, and is fatally shot in the ensuing struggle.
- 💔 Troubled
- 🔫 Tense
- FJ
Father James
Peter's uncle, who is celebrating mass with family members. He is shot along with two other relatives during the climactic sequence.
- 👤 Family
- 🔥 Family conflict
- HB
Henry Birdson
The patient with epileptic seizures whose scribbled notes trigger the events. His exorcism fails, and his screams are heard after tragedy erupts elsewhere, signaling the connection between the possession threat and the living world.
- 🩺 Patient
- 🧠 Neurophysiology
Where and When Is Lost Souls Set?
Lost Souls is set in New York City, Psychiatric clinic, Church and Urban apartments. Here is why the place matters to the story.
Where
New York City, Psychiatric clinic, Church, Urban apartments
The story unfolds across New York City, moving between a Catholic diocese's psychiatric clinic, church interiors, and various urban residences. Key scenes shift from clinical exorcism attempts to tense confrontations inside apartments and church spaces. The city serves as a backdrop that highlights the clash between faith, science, and supernatural forces.
- 🗽 New York City
- 🏥 Psychiatric clinic
- ⛪ Church
- 🏙️ Urban apartments
What Are the Themes of Lost Souls?
3 ideas the story keeps returning to, among them Evil Incarnate, Religious Conflict and Parapsychology.
-
01
Evil Incarnate
Peter Kelson is identified as the vessel through which the devil will manifest, turning skepticism into fear. Maya uses clues like his unique blood type and his baptism history to argue for a supernatural destiny. The narrative explores whether evil resides in a person or is conjured by belief and circumstance. The climactic transformation and Maya's action reveal the fragility of faith when faced with true malevolence.
-
02
Religious Conflict
Exorcism rites expose the strain between clerical authority and human agency. The church figures confront danger and doubt as they attempt to combat a supernatural force. Ritual power is tested when confronted with a genuine occult threat. The events probe whether faith can hold under pressure or crumble into tragedy.
-
03
Parapsychology
Peter's work in serial killer studies and parapsychology anchors a tension between scientific inquiry and supernatural terror. Maya leverages Henry's notes to uncover Peter's identity, blending empirical clues with prophecy. The film juxtaposes rational investigation with phenomena that resist conventional explanation. This tension questions whether science alone can explain the horrors depicted.
What Kind of Film Is Lost Souls?
Dark in tone, with steady pacing and a moderate story, going by the plot summary.
- Tone
- Dark
- Pacing
- Steady
- Story
- Moderate
- Intensity
- High
- Ending
- Bleak
An unsettling and dread-filled supernatural thriller where a frantic race against an apocalyptic prophecy creates a dark, anxious atmosphere of psychological manipulation and inevitable doom.
- unsettling
- ominous
- sinister
- dread-filled
- anxious
- desperate
- demonic possession
- faith and doubt
- apocalyptic prophecy
- supernatural horror
Content notes: suicide, demonic possession, murder, exorcism.
Quiz
How well do you remember Lost Souls? Test yourself on the story.
Where to Watch Lost Souls
Rent or buy it from Amazon Video and Apple TV Store. US availability and prices from JustWatch.
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