A seemingly random shooting in an East London park draws DI "Cab" Calloway into a major investigation. The killing sparks the threat of a major gangland war as rival firms muscle in to control the street drug scene. Political intrigue hinders the investigation, with the appearance of a foreign agent on British soil. And with a rogue assassin at large, nobody can be sure who is the next target... A gripping thriller played out against the backdrop of early Eighties East London.