Carl Hamilton is called to Moscow to testify on behalf of a GRU officer who is charged with treason against the state. He has to testify that the officer has not sold information to Sweden.

The Russians seek help in dealing with the Mafia from the veterans of the Police Academy. They head off to Moscow, in order to find evidence against Konstantin Konali, who marketed a computer game that everyone in the world is playing.

Scientists install a micro chip, called Black Cat, inside the brain of a violence prone girl named Catherine in an attempt to refine and control her fits of rage. Their plan is to turn her into the perfect government secret agent "killing machine".