| Director | Walter Salles |
|---|---|
| Budget | $30 million |
| Box office | $49.5 million |
Dahlia battles her ex-husband Kyle on shared custody conditions of their five-year-old daughter, Ceci. Kyle wants Ceci to live closer to his apartment in Jersey City, where there is a nearby school and rents are affordable. Dahlia instead chooses a dilapidated complex, with no other children, on Roosevelt Islanddespite Ceci being able to access the dangerous and unprotected rooftop and its water tower. After they move in, the bedroom ceiling leaks dark water. Dahlia finds the apartment above flooded and a family portrait of the former tenants, the Rimsky family: a mother, father, and a girl who is Ceci's age. She complains to the manager and to the superintendent, Veeck, about the water, but they do nothing. Paranoid, she complains to her lawyer, Platzer, that Kyle paid people to damage the plumbing.
Dahlia is haunted by ghostly visions and a recurring nightmare in which Mrs. Rimsky threatens to harm Ceci if Dahlia talks to the police. Ceci's teacher is troubled by her "imaginary friend", Natasha, and Dahlia catches Ceci talking to Natasha as well. In the bathroom, Ceci passes out as dark water gushes from the toilets and sinks.
That night, Dahlia sees water spilling from the water tower. Inside, she finds Natasha's body and calls the police. Veeck is arrested, as he was aware of the body, which was why he refused to fix the complex's plumbing problems. Veeck admits that the Rimskys paid him to keep quiet about their wilful neglect of Natasha. Left to fend for herself, Natasha fell into the water and drowned, becoming a vengeful ghost who is jealous of Ceci.
Dahlia finally decides that perhaps the situation is unsafe for Ceci, and will move closer to Kyle. Dahlia is packing and Ceci is taking a bath when Natasha visits Dahlia, begging her not to leave. Natasha attempts to drown Ceci until Dahlia promises to be her mother, at which point, Natasha drowns Dahlia by flooding the bathroom; they walk the hall together as ghosts.
Ceci moves in with Kyle, who is now given full custody of Ceci. Three weeks later, they pick up the last of her belongings from the old apartment. Dahlia's ghost temporarily traps Ceci in the elevator, telling her she will always be with her. The elevator door opens, and Kyle takes Ceci to his home.