Welcome to the world of the City Rats where troubled souls collide to reveal a dark and twisted side of London. Small-time crook Pete (Danny Dyer) tries to get back on the straight-and-narrow after a stint behind bars but quickly finds his past catches up with him. Stalked by a timid old lady looking for her son, Pete begins to revisit the dark world of his violent drug days he thought he had left behind. Caught in the crazy London underworld Pete finds himself mixed up with dodgy dealings, guns, murder and prostitution in his deadly attempts to put the past behind him once and for all.