Following the first adventures of Monkey D. Luffy’s Straw Hat Pirates head to a sea, called the Grand Line. Stuck in the bowels of the giant whale Laboon, they encounter the whale’s caretaker, an old man named Crocus, and Nefeltari Vivi. Taking her with them, they make enemies of the Warlord Sir Crocodile’s secret organization, Baroque Works, and befriend the giants Dorry and Broggy on the prehistoric island Little Garden.