Brook bids farewell to the Straw Hats and leaps overboard, revealing that he can dash across the ocean's surface. Nami, Usopp, and Chopper sail out to explore the island using the Mini-Merry II, and encounter a cerberus. Back on the ship, the remaini... (more)ng crew members are harassed by an invisible creature. After fleeing the cerberus, Nami, Usopp, and Chopper encounter Hildon, a vampiric creature who offers to take them to the mansion of Doctor Hogback.