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Young nobleman Mino lives with his mother and Marta, the housekeeper, in an old, decaying castle. He is infantile and morbidly attached to the weird duo; his only hobby is taxidermy. Laura, Mino's fiancee, is met with jealousy and hatred by the two women, and decides to leave the castle; but Marta sabotages her car brakes and she is killed. Mino takes her body back to the castle.