One Piece: Season 12 Voyage 1

Sailing with Barto Club, the Straw Hats are lured to Silver Mine, where Luffy and Bartolomeo's lives are on the line! After an explosive escape from an underground maze, the crew set their sights on a phantom four-legged island where an ancient tribe is hiding. Making a treacherous climb to the top, they discover a sprawling city in ruins-whose inhabitants don't take kindly to strangers.