Hanna is desperately looking for the leak in the police department, but how far is she prepared to go in the search for the truth?

As Christian struggles with his past, Hanna contemplates throwing him in at the deep end once again as an undercover agent in a dangerous bid to infiltrate The Circle.

An assassination reveals that corruption in the force runs much deeper than anyone thought. Hannah and Billy start to suspect their boss may be involved. When she discovers Bianca has been sent home, Hannah fears for her son.

Hannah decides to take justice into her own hands, but a message from Bianca stops her in her tracks. Hannah and Billy make a breakthrough in their case linking police corruption to the Mimicas and share it with their boss.

Hannah uses Billy's tracker to find him. Dubravka decides to hand the business over to Goran and focus on her future grandchild. Hannah concentrates on rescuing Bianca which leads to a deadly standoff between the two matriarchs.