The station is abuzz as Nick and Hank are called to a case where an innocent flash mob results in a gruesome homicide. As Nick delves further into the investigation, he learns more about his unique family history, and finds himself at odds when he and Hank are assigned to protect a dark character from his recent past.

A prison escapee returns to Portland and seeks revenge on everyone who got him arrested. Nick notices his unusual strength and high tolerance of pain and calls Monroe to help put his rampage to an end.