The respectable middle-class Twist family is settling in for their usual Sunday lunch. Husband and wife Roger and Becky are there, along with their daughter, Lucy, and her husband, Frank. But then they're joined by an uninvited guest... His name is John, and he knows everything about them—including their darkest secrets. After he manipulates his way into the house, John soon has them bound at their wrists and ankles. But what is the agenda of this twisted stranger? One by one, their hidden pasts will be revealed, and horrific events will unfold. Bit by bit, the family’s captor will unveil the shocking truth about his motivations. Will any of them survive the nightmare?