One Piece: Season 1, Episode 140

1 - 140: Residents of the Land of Eternity! The Pumpkin Pirates!

Inside the mist, Luffy and his group discover a large ship graveyard. Luffy salvages a chest filled with gold and jewels from one of the shipwrecks, but a distant voice tells him to return the treasure and leave the mist. Usopp believes the voices to be ghosts, but they actually originate from a group of children who call themselves the Pumpkin Pirates. In his youth, Henzo was a member of this group, and they are the reason for his research. He spent his life in search of a means to rescue them from the Rainbow Mist. Only a short time earlier from their point of view, but fifty years earlier from Henzo's perspective, a group of pirates, led by a Captain Whetton, attacked the children's town. When Whetton came after the children, they tried to escape by stealing the pirates' ship. During the fight, Whetton smashed the ship's helm, and Henzo jumped overboard, taking Whetton with him, while the other children sailed into the mist.