20 years after his escape from Impel Down, the legendary pirate Shiki, the Golden Lion, reappears causing massive upheaval to the Marines. During his long seclusion, he was able to come up with a scheme to bring the World Government to his knees. On his way to execute the plan, Shiki crosses paths with the Straw Hat Pirates and becomes so impressed with Nami's knowledge of meteorology that he abducts her to forcedly enlist her into his crew. Luffy and the gang end up on a strange land populated with monstrous beasts as they desperately search for Shiki and Nami.
Lina Inverse and her sidekick Naga the Serpent are happily enjoying lunch when the entire town ducks under cover before an invasion of Marlene Culvert and her legion of bloodthirsty dragons. The cause of the invasion? Marlene is in a feud with her father, the king, over her allowance. Lina leaps into action to defend the village against Marlene, her tetrad knights and her dragons, but her dependable Dragon Slave spell fails her. Right when she thinks she has won, the real battle has just begun.