Shortly after Alan and Lauren welcome their affluent new neighbors - a legal legend in women's rights law and his beautiful wife - the couple hosts a dinner party that ends in quiet disaster. One of their guests, a young widow, elects to spend the night after indulging in too much wine - only to wake the next morning with no memory beyond getting ready for bed. Was she drugged? Raped?

Psychologist Alan Gregory is plunged into a nightmare by a shocking confession that forces him to make a desperate choice between saving himself or saving the lives of those who have been targeted by a vicious serial killer.