The all-powerful mythical rider Cheng Hao (che Taixian Tae-hyun Cha) has created the myth of winning 300 races in a row. He has a bright future surrounded by halo and honor. However, an accidental car accident took the life of his beloved wife, although he survived, he lost confidence in life and riding, and his eyesight gradually declined, so he had to give up his equestrian career. Life always takes a turn. Cheng Hao, who is destitute with his daughter Yisheng, meets a horse, Luna, who lost his young son and is lame in a car accident at the racecourse. A similar experience cheered Cheng Hao up. He tried his best to hinder the hunting of Luna, tried to tame and began to practice preparing for the race. People's disdain for a defeated rider and a lame horse to win the race, during the technical practice of many difficulties, did not hit this man, one horse, determined to make a comeback, Cheng Hao decided to take a fight for his daughter. Go all out. The film is based on the true inspirational story of Luna, a lame horse and its owner in the documentary film Champ.