One Piece Movie 05: Norowareta Seiken

The Straw Hat crew reaches Asuka Island, home to the Seven Star Sword, a legendary blade surrounded by stories of terrifying power. Soon after their arrival, Zoro disappears and unexpectedly turns his sword against his own companions while helping Saga, an old friend whose fate has become bound to the weapon.

As a red moon approaches, Luffy and the others learn that the sword's curse threatens far more than one village. A young woman named Maya and the sacred orbs guarded by her people may be the only way to restrain its power, but stopping the disaster means confronting both the Marines and the reason Zoro chose to stand on the opposite side.