At 17 years old, Julien has a great sense of humor, bags of charm, and cerebral palsy. In a bid to bond with his father, Julien challenges him to participate with him in the Ironman race in Nice, France, a triathlon in which his father has previously competed. Doing the race alone is an incredible challenge, but completing it together with Julien would be nearly impossible. Still, his father agrees and the two set out to train for and compete in one of the most intense races on earth. Beyond the sporting exploit, this is the story of one family’s exemplary journey, and a moving portrait of the love between a father and his son.