Growing up, “hot tubbing” meant a bathtub in their front yard fed with a garden hose. Inspired to set things right, brothers Kevin and Andrew, get to work on designing and building the ultimate cottage hot tub. With a lust for unobstructed nighttime stargazing, Andrew pushes his brother towards making the hot tub amphibious so they can float out onto the lake in style to view the stars. With their life jackets and frosty drinks loaded on board, the boys set sail for the adventure of a life (or death) time.