One Piece Movie 5 - The Curse of The Sacred Sword

Luffy and his friends arrive at Aska Island to look for a rare treasure, the Seven Star Sword.

There on the island, Zoro reunites with his childhood friend Saga, who has become the master of a marine corps dojo. Saga, who is really a good man, is possessed by the curse of the Seven Star Sword, and tricks Zoro into stealing the three holy gems that take away his power.

Without the gems, priestess Maya and the villagers cannot conduct the ritual to prevent the resurrection of the evil sword's power, which had been sealed by three ancient princes to atone for the death of Maya's ancestor.