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 are 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?