Except for the quiet hum of the boat's engine, all is calm and quiet on the lake surface. Suddenly, the engines rev up, ropes snap as the lines go taut, and startled shouts pierce the air as the campers on the tubes get yanked around the lake at astounding speeds! Sion, Sylvia, Mika, and Lillie hang on for dear life as they fly across the water's surface, at the mercy of the choppy waves and a gleeful boat driver who's all too happy to flip a tube or two. Will they be able to hold on for the entire ride, or will they be tossed into the water like a piece of flotsam?