After almost losing everything to DI Moynihan's sting operation, Nidge travels to Spain to negotiate with wholesale supplier Terence May for a new drugs shipment. Meanwhile in Dublin his enemies are closing in: Siobhan is acting as informant to Moynihan; Patrick has returned to Dublin determined to kill Nidge; and tensions between Nidge and maverick Fran are reaching boiling point.

Fran is banged up in prison but he and Nidge both still conspire to have each other killed, while Siobhan finds her dangerous drug fuelled double life is spiralling out of control.