Banana Boat Island is a madcap world that sits atop an inflatable banana boat. It is home to Pepe, a young boy, and the Ya Mon-Sters. Pepe gets into misadventures with his pet anchor Wilfred. They are joined by other colorful residents like King Doug, Bob the surfer, and Sven filming a reality show. The island is filled with strange plants and creatures and watched over by the volcano Big Mama Cano. Pepe's imagination and mischievous nature lead to zany adventures on the island.