When the matriarch of a well-known criminal family tries to commit suicide, Nick and Kate take in her children. After recovering, she tells Nick that her husband is in prison for a crime he did not commit, and Nick offers to help her get closure by re-investigating the case. Blaketon is against it, especially when it becomes apparent that his predecessor was somehow connected and retired soon after. Meanwhile, PC Phil Bellamy is delighted when his girlfriend falls pregnant and proposes. On his stag night, he is assaulted outside the Aidensfield Arms. With Gina and Greengrass's help, he tries to track down his attacker.