Eliza and Ivy lose their parents at a young age, which affects them differently - Eliza becomes a detective seeking justice, while Ivy turns to serial killing. Years later, Eliza experiences hallucinations of Ivy and finds herself implicated in murders. She discovers Ivy died years ago and her schizophrenia caused her to imagine an alternate reality with Ivy as the killer. Eliza realizes she has been living with schizophrenia since her family's death and turns herself into the police, admitting to the murders due to her illness.