When police officer Peggy Whitfield receives a series of social media messages that instruct her to commit murder, she is plunged into a nightmare and there seems to be no escape. She has no desire to kill anyone, but if she doesn't obey the mysterious messenger, she herself could be killed. Can she solve the mystery behind the messages before anyone is murdered? As she digs deeper, Peggy learns of a computer program named Clean that uses online activity to target those deemed unworthy, an...