Two innocent, teenage girls are targeted by obsessed stalkers. One survived her harrowing ordeal; the other was tragically caught up in a murderous plan carried out by her fanatical stalker. Beautiful Cameron had no idea the horror that would ensue when she sat next to Ryan in her high school art class. For the next 11 years, Ryan interjected himself into every aspect of Cameron's life. Eventually, the obsession escalated and Ryan threatened to kill Cameron. After Ryan broke into Cameron's home and photographed her while she slept, police raided Ryan's apartment where they found a shrine dedicated to his obsession. Ryan was arrested and later sent to prison for 13 years. Unlike Cameron, Amy Lynn didn't know her stalker, Liam; they had a single high school class together, but Liam developed an obsessive, years-long fixation with Amy. No one knew about it until a tragic afternoon when Liam shot Amy to death, then turned the gun on himself.

A man takes cyber-stalking to a whole new level by sending hundreds of threatening messages and posting over 40 videos on social media that document his twisted fixation for a former high school classmate. And an Ohio firefighter is known as a hero and a devoted family man--until he's exposed as the most profilic stalker of women in U.S. history.

A woman scared to death by a stalker is relieved when he disappears for a few years--only to make a terrifying return. And a predator breaks into his ex-girlfriend's house, places hidden cameras in her bedroom, and even installs spyware on her computer.