One Piece Episode 747, " The Silver Fortress! Luffy and Barto's Great Adventure! ", initiates the filler Silver Mine Arc leading into the One Piece: Gold film. Luffy and Bartolomeo are captured by Bill, leader of the Silver Pirate Alliance, and trapped on a mining island. The episode centers on their predicament, with Luffy in a silver restraint and Bartolomeo in awe of him, ending with their attempt to escape.