Dr Thomas Bond, Police Surgeon, is still recovering from Jack the Ripper's depredations when he haunted the streets of London - and a more malign enemy hid in his shadow. Bond and the others who worked on the gruesome case are still stalked by its legacies, both psychological and tangible.

But now the bodies of children are being pulled from the Thames... and Bond is about to become inextricably linked with an uncanny, undying enemy.