The legendary Loreley has been living for centuries in a grotto beneath the river Rhein in Germany. Every night when the moon is full, she turns into a reptile-like creature craving for human blood. When one girl after another of a nearby boarding school is killed by her, a hunter named Sigurd is engaged to kill the monster.
Inspired by "The diabolical" by Clouzot. The life of a woman becomes a sinister nightmare due to the plan drawn up by her husband.
Film inspired on the character from "Don Juan Tenorio".
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