Reverse Mountain Arc

The Reverse Mountain Arc, also referred to as the Laboon Arc and Twin Cape Arc, is the seventh story arc of the manga and anime One Piece, and the first story arc of the Arabasta Saga.

The Straw Hat Pirates make their way to Reverse Mountain and begin the perilous task of scaling its tricky rapids in order to enter the Grand Line. As they descend the mountain, they come face to face with not only the giant whale Laboon, but also mysterious agents Mr. 9 and Miss Wednesday.