A house with a secret. A woman with nothing to lose. When Maggie sees the beautiful Venetian blinds moving in the Caldwells' front window, she freezes. Her favorite neighbours Cady and Josh are away, so who is in their house? The pretty young woman who answers the door tells a convincing story. She's Sarah. The house-sitter. Just here for a month. An old friend of Cady's who needed a place to stay. She's pleasant...