Based on the inspirational true story of a horse that was deemed too small to become a champion.. At the start of the 1980's, Pierre Durand (Guillaume Canet) abandons a promising legal career and throws himself into his true passion - show jumping. With his father's backing, he gambles everything on a young horse that no one else has any faith in: Jappeloup. Too small, too stubborn, too impetuous, he has many faults, but nonetheless has a remarkable jumping ability. From competition to competition, the pair improve and begin to make their mark on the show jumping world. But the Los Angeles Olympic Games is a disaster for them and Pierre has to face up to his shortcomings. With the help of his wife, Nadia (Marina Hands) and groom Raphaelle (Lou de Laâge), Pierre has to regain Jappeloup's confidence and build a relationship with the remarkable horse, as the 1988 Seoul Olympics looms.