Once again murder and other dark doings strike the small city of Fort York, Canada, during World War II and Inspector Albert V. Trethewaynow Regional Officer, Air Raid Precautionis the one man who can solve the mystery. It all begins on January 13th, 1943 when Fort York is in the midst of its most complete wartime blackout. Suddenly there are reports of an eerie flumelike light in the marsh outside the town. Tretheway finds evidence of weird practices that his friend Cynthia Moon identifies as the work of a coven of witches. This is a fitting sequelat once hilarious and bloodchillingto the first Tretheway mystery, .