The mysterious lovers the three girls spied on were engaged in a deadly sexual game no one was supposed to know about. Especially Andie and her friends, whose curiosity had deepened into a dangerous obsession . . . Now, fifteen years later, someone is watching Andie. Someone who won't let her forget the unsolved murder of "Mrs. X" or the disappearance of "Mr. X." Suddenly Andie doesn't know who her friends are . . . Because loyalty can be murder.