After Katie learns that her brother was killed in an ambush while heading to Moss Creek, she begins to realize that a copycat killer is on the loose. She doesn’t have time to think about who might have taken her brother’s place as the Shock Killer, or taken her brother’s life before she receives a packet of newspaper clippings from the prison where her brother had resided. The packet refers directly to third victim of the Shock Killer. As Katie and the team of law enforcement officers dig deeper to learn what went on, a killer is determined to make sure they don’t find out the clue that Robert wanted his sister to learn.