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Mack Bouwense is ten years old and already a motocross-champion. He spends almost all his time on the circuit. He won his first motocross race at age 3, and his room is now filled with trophies. But the obstacles he faces on the track are nothing compared to what he's already overcome. His sister is allergic to almost everything, his mother has cancer, his grandpa just died and Mack was born with his heart on the opposite side of his chest, and from the day he was born, he's been defying the doctors who claim that it's impossible for him to live another day.
