The series revolves around the violent power struggle between rival gangs in London.

The cast of Gangs of London includes Sope Dirisu, Paapa Essiedu, Lucian Msamati, Michelle Fairley, Orli Shuka, Pippa Bennett-Warner, Brian Vernel, Narges Rashidi, Asif Raza Mir, and Valene Kane.
Gareth Evans returns as showrunner, and Peter McKenna will once again be attached as a writer to the series.
In season three, as Sky previously revealed, the city descends into chaos after a contaminated cocaine supply causes hundreds of casualties. Familiar faces and new characters clash, leading to brutal power struggles, unexpected alliances, and rivalries.
Former undercover agent Elliot must maintain his position as a top criminal alongside the Dumanis, while the Wallaces, Luan, Lale, and the street gangs face severe consequences. The incident turns out to be no accident but a deliberate attack — yet the question remains who is truly pulling the strings.