Following the lives of five new and inexperienced police recruits in their mid-20s who trained together and must now learn at first hand the hardest kind of policing there is: as big-city crime-fighters. Andy faces a volatile gunman when the high-risk takedown of a suspect does not go as planned.
Tragedy strikes the Hawthornes. Cam, Tessa and Alison look for an explanation for the silver bells they found. Garrett plans to expose a family secret. The police inquiry into the `Silver Bells Killer' sends Brady on a hunt for DNA.