Susannah Cahalan, an up-and-coming journalist at the New York Post becomes plagued by voices in her head and seizures, causing a rapid descent into insanity.

"It's not supposed to happen. Be prepared when it does."

Credits

Gerard BarrettDirector

Chloë Grace MoretzSusannah Cahalan

Thomas MannStephen Grywalski

Richard ArmitageTom Cahalan

Carrie-Anne MossRhona Nack