Delirium is a 2018 American psychological horror film directed by Dennis Iliadis and written by Adam Alleca. It stars Topher Grace, Patricia Clarkson, Callan Mulvey and Genesis Rodriguez. The film was produced by Jason Blum through Blumhouse Productions and Leonardo DiCaprio through Appian Way Productions. The film was released by Universal Pictures on May 22, 2018, via video on demand and DVD on June 5, 2018.

Plot

After spending twenty years in a mental institution, Tom Walker is released back to the mansion that he has inherited from his wealthy father, a senator who recently committed suicide. Tom is placed under house arrest, and must check in via video phone daily for thirty days or he will be returned to the institution. His parole officer, Brody, alludes to a violent crime committed by him and his older brother, Alex. Tom suffers from hallucinations of his late father, hears noises throughout the house, and receives calls from a stranger with a garbled voice, which make him believe that he is relapsing. He has a vision of a girl being drowned, and discovers a tongue preserved in a mason jar in the indoor pool's control panel, which he writes off as another hallucination. He also discovers a secret tunnel in his father's office that provides access to peepholes around the house. His brief respite comes from a market worker named Lynn, who delivers his groceries.