Short answer: The box contains the severed head of Detective David Mills’ wife Tracy — and the news that she was pregnant. Serial killer John Doe murdered her out of envy, then goads Mills into shooting him, making the detective the final sin: wrath. The ending is a trap Doe designed from the start, and it works perfectly.
Spoiler warning: This article explains the entire ending of Se7en, including the fate of every major character. If you have not seen the film, turn back now.
The Story So Far: Seven Sins, Five Murders
Se7en (1995), directed by David Fincher, follows two homicide detectives in a nameless, rain-soaked city. William Somerset (Morgan Freeman) is a veteran one week from retirement. David Mills (Brad Pitt) is his young, hot-headed replacement, newly arrived with his wife Tracy (Gwyneth Paltrow). Their first case is a murder staged as a sermon: a killer is working through the seven deadly sins, one victim at a time.
The detectives uncover five murders — gluttony (a man forced to eat until he dies), greed (a lawyer forced to cut off his own flesh), sloth (a man kept tied to a bed for a year), lust (a man forced at gunpoint to murder a sex worker) and pride (a disfigured model who chooses death over living disfigured). Then the killer, John Doe (Kevin Spacey), walks into a police station covered in blood and surrenders, offering to lead the detectives to his last two victims.
The Ending, Scene by Scene
1. The drive into the desert. Doe leads Somerset and Mills to a barren stretch of desert beneath power lines, a helicopter circling overhead. Doe is calm, almost cheerful, telling Mills he admires his youth, his passion, his normal life with Tracy.
2. The delivery van. At the appointed hour, a van approaches. Somerset walks out to meet the driver, who hands him a small cardboard box. As Somerset carries it back, Doe tells Mills he visited their home and tried, briefly, to imagine living Tracy’s life.
3. “What’s in the box?” Somerset opens the box and recoils. Mills, holding Doe at gunpoint, demands to know what is inside — the question that has become one of the most quoted lines in cinema. Fincher fought the studio to keep the contents off-screen: the audience never sees them. Somerset’s face says everything.
4. The reveal. Doe confesses: he killed Tracy and took her “pretty head” — and she begged for her life and “the life of the baby inside her.” Mills did not know Tracy was pregnant; she had told Somerset, not him. Doe’s sin was envy: he coveted Mills’ ordinary, happy life and destroyed it.
5. The final sin. Doe begs Mills to kill him. Somerset pleads with his partner to put the gun down — if Mills shoots, Doe wins. Mills hesitates, his gun trembling, and then fires, shooting Doe in the head. The sermon is complete: Mills has become wrath, the seventh sin.
6. Somerset stays. Mills sits motionless in the back of a police car, broken. Asked where he will be now, Somerset — who spent the film counting down to retirement — replies: “Around. I’ll be around.” His closing voiceover quotes Ernest Hemingway: “The world is a fine place and worth fighting for.” I agree with the second part.
What the Ending Means
Doe’s plan is airtight: his surrender was the final phase, not a defeat. He needed a killer for envy (himself, murdering Tracy) and one for wrath (Mills, murdering him). Somerset understands the trap — that is why he begs Mills not to shoot — but understanding a trap is not escaping it. The final line is Somerset’s answer: he rejects Hemingway’s first clause but accepts the second. He will stay and fight.
Competing Interpretations
- Doe won completely. The killer’s design succeeded in every detail: two more people dead, Mills’ life destroyed, the seven sins fulfilled exactly as planned. Evil, in this reading, is organised and patient; good is emotional and easily manipulated.
- Mills had no real choice. Some viewers argue the film does not judge Mills — that anyone told their pregnant wife has been beheaded while the killer taunts them would pull the trigger. The ending is a tragedy about human limits, not a moral test Mills failed.
- Somerset is the real ending. The veteran begins convinced the city is beyond saving and ends it choosing to stay. The horror does not change his mind about the world — it changes his mind about walking away.
Frequently Asked Questions
What is in the box in Se7en?
The severed head of Tracy Mills. The film never shows it on camera — Somerset’s horrified reaction and Doe’s confession tell the audience what is inside.
Was Tracy pregnant in Se7en?
Yes. She had told Somerset in confidence but not Mills. Doe reveals the pregnancy to Mills in the final scene, moments before Mills shoots him.
Why does Mills shoot John Doe?
Doe murdered Mills’ wife and unborn child out of envy, then provoked Mills into killing him. By shooting Doe, Mills becomes wrath — the seventh and final sin.
What does Somerset’s final line mean?
Quoting Hemingway — “The world is a fine place and worth fighting for” — Somerset agrees “with the second part”: the world is not fine, but it is worth fighting for, so he abandons retirement.
Does Se7en have an alternate ending?
Several were written, including one where Somerset kills Doe and one where Tracy survives. Fincher and Brad Pitt insisted on the head-in-the-box ending; Pitt reportedly made it a condition of taking the role.