Kuno purchases a strange egg, believing that the mysterious powers of the legendary Phoenix will help him defeat Ranma. But when the egg hatches on his head, the bird goes out of control and wreaks havoc all over Tokyo. Ranma and the gang must use any means necessary to get the Phoenix to leave Kuno's head and fly away.

Ranma and his friends must fight against powerful enemies in order to break the rules and overcome various obstacles.

In this movie, Ranma and his friends must rescue a group of brides who have been abducted and taken to Togenkyo, a mystical island. Along the way, they encounter various challenges and comedic situations as they try to save the brides and uncover the secrets of the island.