Six months after the unsolved murder of a young woman who had been his assistant magician Azrah arranges a seance that will be attended by his former partner La Tour, as well by detectives and interested parties who may also be suspects. The seance is abruptly ended when la Tour is murdered and general confusion and much activity inside and outside Azrah’s stone fortress, a veritable castle of magic, ensues until everything is sorted out and the culprit is revealed.