In a not far future the German city of Frankfurt at the heart of Rhine-Main Metropolitan Region with over five and half million residents burns in trouble. Armed gangs have taken control of vast neighborhoods and the police are struggling to come on top of the affairs. In the meantime, the American megacorporation U.C.P. takes over running the police in the city as the local government has gone bankrupt and the central government in Berlin grapples with its own amassing problems. In this unsteady situation, police officer John Shannon has just arrived from his home city Detroit in the U.S. His wife is going to work as an English teacher in Frankfurt. They have escaped the increasing instability in their home country, unaware that far worse is in store for them.