One Piece: Curse of the Sacred Sword
The Straw Hat Pirates landed on Earth: The Seven Star Sword at Asuka Island, home of the sword that was most valuable. That has been believed to curse anyone who takes it in ownership. Once they got back into the Moving Merry, they discovered that Zoro is missing from his guard duty. They could plan a search party to relocate him. Luffy and friends escape from the jack as Marines were in their tail. They found that a new place to dock, which is near a village. Whose job would be always to maintain the Seven Star Sword sealed. So on the Marines assaulted it, and included in this would be Zoro. others and luffy don't know why he is helping the Marines from. However, it involves completion when Saga: Zoro's childhood friend from Swordsman training is encountered by Luffy.