The Straw Hat Pirates sail through the Grand Line, with Chopper feeling teased by Usopp's doubts about his bravery. They spot Crown Island, said to hold a crown treasure, and after a series of geysers erupt, the crew finds themselves flying over the island. Chopper falls off the ship and is separated from his friends, who land on the other side and meet an elderly parrot. Meanwhile, Chopper is worshiped as the island's new king by the talking animals, who believe a new king appears from the heavens when the old one passes away. However, Chopper wants to be a pirate, not a ruler, and a trio of human "horn" hunters, led by Count Butler, threaten to terrorize the island.

One Piece: Chopper's Kingdom in the Strange Animal Island
The Straw Hat Pirates embark on a thrilling adventure in the Grand Line, as Chopper is put to the test by Usopp's playful challenge, and Nami's navigation skills guide them to a mysterious island, filled with excitement and surprises.