As torrential rains wash away the stench of a London heat wave, another kind of wave is sweeping through the city streets. A rash of ghost sightings, followed quickly by madness—and horrifying, eye-melting blindness.

The outbreak hits close to home when Lord Crane’s manservant, Merrick, becomes the newest victim. Desperate to find the cause of the malady, Crane and his magician lover, Stephen Day, are in a race against time—to put an end to the magical assault and put to rest the painful memories resurrected by ghosts of the past.