Ali and the squad try to narrow the field on Sam Drainie, the former Ambleton security guard they believe is responsible for the shooting death of Ken Osborne, and possibly the deaths of Billy Wells and Michelle Ripley. Ali is also trying to juggle her personal life when she repeatedly makes and breaks dates with Vanessa's father, Dan.

Harper struggles to build a case against a murder suspect, after an investigation that lasted 18 month long.

The Squad continues to work on the Ambleton case, feeling they've hit a break when they arrest a former student, Shelley Mack, who tells Mickey and Ali about parties that used to be held in the Love Shack, with Desmond Cage in attendance. Nicco tries to help Billie beat her addiction and get away from her pimp, but when he can't find her a place in a rehab clinic he tries to help her go cold turkey. Andy has no choice but to turn over the Ambleton files and all evidence on Desmond Cage when a request from higher up comes down.