After almost losing everything to D.I. Moynihan’s sting operation, Nidge travels to Spain to negotiate with a wholesale supplier for a new drugs shipment. Meanwhile, Patrick has returned to Dublin to exact revenge, and tensions between Fran and Nidge reach boiling point.

In the aftermath of Pauley’s death Siobhan must face her most terrifying opponent yet as Terence May flies in from Spain to lay his nephew to rest—and to find the truth.

Nidge is summoned back to Spain, where Terence demands a terrible price for his continued support, while Siobhan and Moynihan reach an unholy deal of their own.