When her mentally ill mother passes away, a woman named Annie (Toni Collette) and her husband (Gabriel Byrne), son (Alex Wolff), and daughter (Milly Shapiro) all mourn her loss. The family turns to different means to handle their grief, including Annie and her daughter both flirting with the supernatural. They each begin to have disturbing, otherworldly experiences linked to the sinister secrets and emotional trauma that have been passed through the generations of their family.

Annie is a wealthy model maker with a family history of mental instability. After her elderly mother passes away, Annie, her disturbed daughter, Charlie, and, eventually, her teenaged son, Peter, begins to experience strange visions and compulsions, much to the distress of her skeptical husband, Steve.