Devlishly wicked tale of a murderer(the deliciously vile Tod Slaughter)stealing the identity of Percivel Glyde, a man supposedly on the throes of receiving a large castle and possible fortune. What the false Glyde doesn't expect is that the ancestor not only left him the castle, but in a state of massive debt. He is told, however, that his ancestor had arranged a marriage between Percival and Laurie Fairlie(Sylvia Marriott), the daughter of a nobleman who left her in the care of a selfish old disease-phobic uncle, Frederick(David Horne)who is squeamish when anyone challenges him or sneezes around him..he often goes into outrageous fits when Laurie's very vocal, high-strung sister Marion(Hilary Eaves)confronts him on his wrongs and attitudes towards them. But, Laurie, despite being madly in love with "paint-instructor" Paul(Geoffrey Wardwell), agrees to marry Percival, although she's deeply sad regarding the weighted burden of marrying a man she'll never love. The arrangement of marriage could lead to quite a fortune if the false Percival can get Laurie to sign a document turning over her assets to his name. Marion, Laurie's confidant and adviser, however, will always be a thorn in the false Percival's side. Also, weighing on the false Percival's mind is the mother of the real Percival's child, a woman bound in a private asylum, ran by the slimy director Dr. Isidor Fosco(Hay Petrie;playing him as a sly scoundrel, almost as devious a character as the false Percival). He'll have to be rid of the mother, Mrs. Catherick(Elsie Wagstaff)and somehow get rid of a nagging nuisance that develops..the real Percival's daughter, the "woman in white" Anne Catherick(also played by Sylvia Marriott)escapes from the asylum in an unfortunate mishap and begins raising havoc informing Paul that the false Percival only wishes to marry Laurie for her money. And, he has ANOTHER problem he'll have to deal with, a lovely servant girl he soon makes a chambermaid..she's pregnant with the false Percival's child and wants to marry him herself. He contends with all this drama while being blackmailed by Fosco who will keep his lips sealed if the false Percival feeds his pockets with a large sum. Together, the false Percival and Fosco etch out a plan..because Laurie and Anne look almost identical, they could let Anne die of the pneumonia she contacts being out in the open too long and switch her body with Laurie's. They'd lock Laurie away in the asylum with everyone believing her dead using the corpse of Anne as the disguise. Through and through, however, Paul and Marion will not easily sit on their hands when they know deep down inside that the false Percival is indeed not who he he says he is. And, it's only a matter of time before the relationship between two scoundrels, Foscoe and the false Percival will deteriorate.
Marvelously twisted black comedy is played with such relish and glee, the flick is intoxicatingly entertaining..if the material suits your tastes. The false Percival, played with such demented joy by a great Tod Slaughter, who cackles with widened eyes as he strangles innocents unfortunate enough to meet him late at night at an isolated boat house. The film is also startlingly adult presenting some pretty disturbing material played to the hilt. I mean, in the opening scene, Slaughter kills the real Percival with hammered stake to the temple of his skull! Despite watching a bad quality print(this terrific film deserves a pristine copy if ever a film deserves one), the film's still atmospherically rich with a very noirish, Gothic, decadent beauty. A must-see for fans of macabre comedies. Not for all tastes.