How do you stop an assassin that can't be killed? When several members of the diplomatic service die in seemingly innocent, yet strangely similar circumstances, it seems a unique form of murder is being used. Toby Greene is part of Section 37, known as The Clown Service, a mostly forgotten branch of British Intelligence tasked with fighting exactly this kind of threat. However, the Rain-Soaked Bride is no ordinary assassin. Relentless, inexorable and part of a larger game, merely stopping this impossible killer may not be enough to save the day...