A renowned FBI agents, whose methods aren't by the books, and a new Assistant District Attorney form an unlikely alliance to bring down a gang of armoured truck robbers.

Decourcy learns that he has a powerful enemy in town, and his wife is put in an uncomfortable position. Meanwhile, Jackie causes trouble in his own home.

Jackie looks for his absent informant, Jenny revisits her teaching passion, Decourcy concocts a plan to overcome the town's infamous "Code of Silence".

Jackie bullies Jimmy into locating the armoured truck guards. Decourcy rattles a suspect called to testify before the Grand Jury. Siobhan discovers something unsettling about the leader of the Coalition.

Jackie and Decourcy search for the weapon connected to the Revere robbery. A local reporter receives a tip about a story that could lead her down a treacherous path. Siobhan questions if doing what is right is ultimately what is best.

Decourcy becomes a step closer to connecting the stolen guns to the Revere robbery when an insider agrees to talk. Jenny cannot ignore Jackie's indiscretions when they arrive at her doorstep. Money issues worsen for the Ryan family.