Seven suicides in five years. It's more than coincidence. The Wheatstone Pond is a killer. Everyone knows the Pond should be filled in, but first it has to be drained. The beguiling Hermione from the City Toy Museum is intent on excavating the wrecks of a hundred years of model boats. But there's more down there, under the evil black slime, than they bargained for - a hundred years of a city's guilty secrets, and much, much worse.