Can a skateboard pro conquer the slopes? Dennis O'Malley is the best skateboarder in town. Unfortunately, he has to shelve his board for more than half the year, when the streets are covered with snow. Then a new sport emerges on the scene, one that Dennis's friends think he'd be a natural at: snowboarding. Since snowboarding and skateboarding use such similar moves and techniques, making the jump from the streets to the slopes should be a breeze for Dennis. Only Dennis knows it won't be....