The season follows Monkey D. Luffy and the Straw Hat Pirates as they enter the Grand Line. After encountering the giant whale Laboon and his caretaker Crocus, they meet Princess Nefertari Vivi and become involved in the conflict against the criminal organization Baroque Works, led by the Warlord Sir Crocodile. Along the way, they also befriend the giants Dorry and Broggy on Little Garden.