The Killing of a Sacred Deer: Ending, Plot & Meaning Explained

Few films linger in the mind quite like Yorgos Lanthimos’ 2017 psychological horror, where a charming family dinner turns into a slow-motion nightmare. The premise sounds almost absurd on paper — a teenager forces a surgeon to sacrifice one of his own — yet Lanthimos plays it with chilling deadpan sincerity. By the time the credits roll, viewers are left grappling with questions about guilt, fate, and what we owe the dead.

Director: Yorgos Lanthimos ·
Release Year: 2017 ·
Genre: Psychological Horror Thriller ·
Runtime: 121 minutes ·
Lead Actors: Colin Farrell, Barry Keoghan

Three production pillars and six critical data points shape how critics and audiences understand this film.

Why is The Killing of a Sacred Deer disturbing?

Unsettling family dynamics

Lanthimos has built a career on exposing the grotesque beneath domestic normalcy, and The Killing of a Sacred Deer exemplifies this approach with surgical precision. The Murphy family lives what appears to be an ideal suburban life — Steven (Colin Farrell) is a respected cardiac surgeon, his wife Anna (Nicole Kidman) is a ophthalmologist, and their two children seem healthy and well-adjusted. Yet Lanthimos strips away the comfort of familiarity, revealing something sinister lurking beneath.

The introduction of Martin (Barry Keoghan) into this family unit serves as a catalyst that unravels everything. Martin is polite, almost eerily so, asking to be part of the family dinners, spending time with the children, showing an intimate knowledge of their daily routines. This calculated intimacy — combined with his calm insistence that Steven owes him a debt — creates a dread that builds through ordinary conversations rather than jumpscares.

Psychological tension buildup

Characters exhibit stilted dialogue and awkward silences that feel designed to maximize discomfort. According to the Oberlin Review, Lanthimos’ films frequently feature alien-like beings struggling with human behavior — and Martin represents this perfectly. He approaches human relationships with a transactional logic that mirrors clinical precision, making his menace feel almost rational.

The horror escalates not through violence but through illness. Family members suffer progressive symptoms: paralysis, vomiting, inability to eat, and finally bleeding from the eyes (ScreenRant). These physical deteriorations unfold with detached matter-of-factness, as if documenting a medical case study rather than a family’s nightmare.

The film demands multiple viewings to unravel its layers (ScreenRant), not because it’s confusing, but because the implications deepen with each watch. What initially seems like an improbable premise reveals itself as a meditation on guilt and the impossibility of escaping consequences.

What was the meaning behind The Killing of a Sacred Deer?

Themes of guilt and retribution

The film operates on multiple thematic levels, with guilt serving as its primary engine. Steven is a cardiac surgeon — someone who literally holds lives in his hands — yet he cannot save his own family from the curse his actions set in motion. This irony runs throughout: his professional expertise in matters of life and death makes his helplessness in the face of Martin’s demands all the more acute.

The film explores themes of revenge, justice, twisted power dynamics, guilt, and retribution (ScreenRant), but it refuses to moralize. Steven is not purely innocent — he killed Martin’s father while drunk driving and never faced consequences — yet the punishment (choosing which of your children dies) feels disproportionately cruel. The audience finds itself simultaneously judging Steven and sympathizing with his impossible position.

Mythological parallels

The title references the Greek myth where Agamemnon kills Artemis’ sacred deer, requiring the sacrifice of his daughter Iphigenia (ScreenRant). In Euripides’ ‘Iphigenia in Aulis’, Agamemnon sacrifices Iphigenia, who turns into a doe (SlashFilm). The parallel is explicit: Steven killed Martin’s father (the sacred deer), and now must sacrifice an innocent to restore balance.

Martin embodies both Artemis demanding sacrifice and the Grecians threatening the family (Collider). He is simultaneously judge, jury, and executioner — a human face for cosmic justice. Unlike the mythological gods who act with divine detachment, Martin forces Steven to confront his crime in the most personal way possible.

The ending symbolizes Steven’s powerlessness against cosmic forces and fate (YouTube Ending Explained). By randomizing the sacrifice through blindfolding and spinning, Steven attempts to evade moral responsibility — he doesn’t choose, fate does. Yet this act of attempted abdication reveals something darker: under sufficient pressure, ordinary people will commit extraordinary atrocities to survive.

How did Martin curse the family?

Origin of the curse

Martin’s father died after being struck by Steven’s car while the surgeon was driving under the influence (Collider). Steven faced no legal consequences for this death — a fact that clearly festers in Martin’s mind. Rather than seeking conventional revenge through the legal system or physical violence, Martin has devised something far more psychologically devastating.

The nature of Martin’s curse remains deliberately ambiguous. Whether it operates through supernatural means, psychological manipulation, or some combination is never explicitly explained. What is clear is that Martin has complete confidence in its eventual efficacy, suggesting either genuine supernatural ability or an absolutely convincing act (YouTube Explained).

Symptoms progression

The curse manifests as a progressive illness affecting family members. Symptoms escalate in stages: first paralysis of the limbs, preventing basic movement, then vomiting, followed by the inability to eat (the body rejecting sustenance), and finally bleeding from the eyes — the terminal phase (ScreenRant).

Martin watches Groundhog Day with Steven, a film about being trapped in repetitive loops (YouTube Explained). This choice feels deliberate: Martin’s curse traps the family in an inescapable pattern where the only escape is through tragedy. The parallel underscores how Steven’s single moment of irresponsibility (drunk driving) now defines his entire family’s fate — a permanent sentence for a momentary lapse.

What happened to the children in The Killing of a Sacred Deer?

Curse effects on kids

Both children in the Murphy family become targets of Martin’s curse. Kim, the daughter, suffers the illness but her symptoms cease once the sacrifice is completed. Bob, the son, is not so fortunate.

Bob starts bleeding from the eyes as the final stage before death, prompting Steven’s desperate action (ScreenRant). This symptom represents the curse’s terminal phase — once the eyes begin bleeding, death follows imminently without intervention. Steven faces an impossible calculation: let Bob die slowly and painfully, or attempt the random sacrifice that might (or might not) satisfy Martin’s demands.

Family’s final choice

The film ends with Steven blindfolding himself, spinning, and randomly shooting a rifle, killing his son Bob (ScreenRant). Steven ties up his family with duct tape before spinning and shooting (Wikipedia), creating one of cinema’s most disturbing images of parental violence.

Bob, the most innocent, pays the price like Iphigenia (YouTube Explained). The film suggests that innocence offers no protection against cosmic justice — if anything, it makes the sacrifice more tragic and more acceptable to fate. The randomness of the choice compounds the horror: Steven didn’t choose Bob, but the system did.

The sacrifice fulfills the rules, stopping the curse on Kim and Anna (SlashFilm). The family is later seen at a diner without Bob, where Martin enters, observes them satisfied, and leaves (Collider). The ending shows family unable to cope or acknowledge the truth (Collider) — they sit together but are fundamentally broken.

Is The Killing of a Sacred Deer a good movie?

Critical reception

The film premiered at Cannes in 2017, where it won the Best Screenplay award (ScreenRant). The Cannes jury clearly recognized something special in Lanthimos’ screenplay — a work that manages to be simultaneously absurd and deeply serious, comedic and tragic.

On Rotten Tomatoes, the film holds a 79% critics score, indicating generally favorable reviews (Ashley Hajimirsadeghi Blog). Critics praised the film’s bold visual style, the unsettling atmosphere, and the powerhouse performances — particularly Barry Keoghan’s chilling portrayal of Martin.

Audience reactions

Audience reactions have been more mixed than critical responses, with some viewers finding the deliberate pacing frustrating and the ending emotionally exhausting. The The Reveal Substack positions the film as part of the new cult canon — films that gain appreciation over time as audiences return to unpack their complexities.

“The unsettling power of Yorgos Lanthimos’ cinema comes from how he turns everyday life into something that feels disturbing and alien.”

— YouTube Video Essayist (YouTube Lanthimos Analysis)

“That’s about as random, as meaningfully meaningless, as admitting subservience to controllers beyond our control as you can get — Artemis wins.”

— Film Critic for Collider (Collider)

The ending offers a chilling exploration of guilt and retribution (YouTube Ending Explained) that lingers long after viewing. Unlike horror films that provide catharsis through survival or victory, The Killing of a Sacred Deer leaves its audience trapped in the same paralysis as the Murphy family — watching something terrible unfold with no power to intervene.

For viewers seeking to understand cinema’s capacity for psychological horror, the film represents essential viewing. Its exploration of what ordinary people might do when pushed beyond moral limits remains uncomfortably relevant. The Killing of a Sacred Deer doesn’t just tell a story about fate and guilt — it implicates its audience in the same impossible choices Steven faces.

Related reading: The Gray Man Reviews · Crisis on Infinite Earths Watch Order

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