 In 1977, in Montreal, the scared writer Wilbur Gray visits his publisher Frank Richards to disclose his new book about the evilness of cats. Wilbur tells that the felines are supernatural creatures, and that there is a saying in which the cat would be the devil in disguise. Wilbur tells three tales to illustrate his thoughts. In 1912, in London, Miss Malkin is a wealthy woman that rewrites her will leaving her fortune to her cats rather than to her nephew Michael. Her maid Janet, also mistress of Michael, steals one copy of the will from the lawyer s briefcase and tries to destroy the original copy which is kept in the safe. When Miss Malkin sees her attempt, Janet kills her and the cats revenge Miss Malkin. In 1975, in the Province of Quebec, the orphan Lucy comes to live with her aunt Mrs. Blake, her husband and her cuisine Angela after the death of her parents in a plane crash. Lucy brings her only friend, the cat Wellington, but her mean cuisine forces her parents to get rid off Wellington. Lucy uses the witchcraft book of her mother to revenge Wellington. In 1936, in Hollywood, the actor Valentine Death replaces the blade of a fake pendulum to kill his wife and also actress and give a chance to his young mistress and aspirant actress. The cat of his wife revenges her.