On a boulevard in North London, a car crashes into a shop window. The driver appears to have lost control. Except the man in the driver's seat was murdered a week ago...

In Hampstead Heath park, a fire smolders. Within its flames lies the next victim. As the autumn leaves begin to fall, a serial killer spreads panic in the city, playing games with the police. The death list grows quickly, as the investigations reach a dead end.

One thing is certain: this is no ordinary killer. Each new victim sends a message to one woman only. Frieda Klein is hiding. But someone has decided to find her...