Mystere LeJeune, the infamous witch, and wife of a renowned criminologist, hastily arranges for her husband's pending cases to be cleared away in order to make way for their two-week Yule celebration. But the Fates have other plans as a strange murder manifests itself in an alley behind an opulent department store. A dead Santa Claus sparks off a series of events that test Mystere's resolve and patience and test Blaine's formidable crime-solving skills.