After her village falls to human invaders, the noble knight Elfina sacrifices her freedom to save the princess and her people, agreeing to become the personal plaything of the conqueror, Mordo. While Elfina struggles to maintain her knightly pride and resist her growing desires, she is gradually broken down by Mordo's demands and her own repressed lust, eventually succumbing to a pleasure she can no longer fight.
Elfina attempts to reclaim her dignity in an arena match, only to be further broken and branded a "slave to pleasure" before a crowd. Even after a political shift restores her status as a knight and establishes peace between humans and elves, she remains hopelessly devoted to her master's whims. Between a hedonistic banquet at the princess's castle and the influence of the dark elf Rosetta, Elfina continues her descent into a life of erotic servitude.