As chaos erupts in London after a spiked shipment of cocaine kills hundreds, fan-favourite characters collide with new faces bound by blood ties, sparking brutal power struggles, unexpected alliances, and fierce rivalries. Former undercover cop turned gangster Elliot navigates his new role as a top-level criminal alongside the Dumanis, but the spiking throws their operations into disarray. The Wallaces, Luan, Lale, and the street gangs face devastating consequences as personal vendettas collide with professional power struggles bleeding into violent turf wars. In the ruthless fight for control of London's criminal underworld, no one is safe. This was no accident — it was a calculated attack. But who's pulling the strings?

Elliot's investigation puts him on a direct collision course with the Mayor. Marian decides whether to reunite with her family.