Sylpha, a proud elven forest guardian, is defeated and branded with a mysterious crest by a man who steals her village's treasure. The crest subjects her to uncontrollable fits of arousal, driving her on a desperate journey to a human town to find the man and lift the curse. However, after a final confrontation, Sylpha is broken by the crest's power and forced into submission, becoming the man's captive as he leads her back to the elven forest.
The elf attempts to assassinate the man who stole her village's sacred jewel, only to discover the jewel's power to control tentacles and the true nature of the lewd crest as a magical energy-leeching contract. Upon reaching a small village, the man uses a spirit beast potion to strip away her autonomy, forcing her into a state of conscious obedience and public submission. Though her body and mind are pushed to their limits, the elf secretly vows to one day reclaim her freedom.