New York City bike messenger Holden March creates a video diary of his troubles with women. Talk soon escalates to action, and the SVU scrambles to find his manifesto before he commits another violent act. When Rollins and Amaro come face to face with Holden, they find out just how dangerous a desperate man can be. Meanwhile, as Benson balances the responsibilities of motherhood and career, the new Deputy Chief of SVU calls her leadership into question.

Best friends Perry Gilbert and Mia Harris sneak into the woods with Mia's young sister Zoe in tow. Their search for the mythical Glasgowman leads to a series of violent events, leaving Zoe gravely injured and the other girls missing. While Detectives Rollins and Carisi work to locate the suspect, Sgt. Benson digs through the stories to distinguish fantasy from reality.