Sold to his greedy uncle in the field of sexual services, the innocent Gisella Trilane finds herself imprisoned in a dark and sinister dungeon. A muscular naked man named Tristan, chained to the wall, tells her he is cursed. Every month he is doomed to lose his humanity and acquire the characteristics of a predatory beast - a beast with needs too wild to be satisfied by an ordinary woman. Properly break the curse Giselle can only fully obey the beast and voluntarily satisfy his frantic sexual desires. But the high stakes in this tale are justified, and if Gisella cannot fully open herself to Tristan's lust, she may lose her life when she tries to tame the beast.