One Piece Season 10: Thriller Bark

The Thriller Bark Arc is the eighteenth story arc in the series, and the first and only in the Thriller Bark Saga. The Straw Hats, during their journey into the Florian Triangle arrive at a haunted island/ship called Thriller Bark, in which their shadows are stolen by Warlord of the Sea Gecko Moria and must hurry to get them back before the sun rises. After defeating Moria, another Warlord shows up to make the Straw Hats' situation worse. The Straw Hats also gain a new crewmate, a living skeleton named Brook who becomes their musician.