Princess Rimi and her concubine have fallen in love, her father is pleased. But, he takes advantage of his daughter's concubine to test her devotion for his daughter.
This angers Rimi to no end, and she takes her vengeance. Rimi and Kumiko defy danger and run away to the oceanalthough the tradition claims a tentacle monster awaits the Futa Princess and he will take her for his bride.
The beast uses Rimi and Kumiko is unimaginable waysbut Rimi may ultimately be able to secure her freedom if she's willing to go the extra mile.