The Straw Hat Pirates travel to the ghost island of Thriller Bark, where they encounter the ShichibukaiGecko Moria. Using his Devil Fruitabilities and the surgical skills of his subordinate, Dr. Hogback, Moria uses Luffy's shadow to revive a legendary giant, Oars. With the help of a skeleton named Brook the Straw Hats fight and defeat Moria and Oars. Brook also reveals himself to be the former captain of the Rumbar Pirates and longtime friend of Laboon, a whale who the Straw Hats met at Reverse Mountain. After Moria's defeat, Brook joins the Straw Hat Pirates as their musician.
Thriller Bark Saga is the shortest saga in both the manga and the anime yet, running through only 5 volumes and 48 chapters for the manga, and 45 episodes for the anime. It is also the only saga with one arc.