The journey begins on the cusp of WWI, as an English farming family buys a fiery hunter colt at auction despite not having the funds to pay for him. Named Joey, the horse seems to be nothing but a loss for struggling Ted and Rosie Narracott (Peter Mullan and two-time Oscar® nominee Emily Watson), but their son Albert (newcomer Jeremy Irvine) is determined to tame and train him, making the most of Joey's enthralling spirit, speed and affection. The two are inseparable, but when war breaks out, they are pulled apart as Joey is sold from under him and heads to the front as the mount of a dashing British cavalry officer.
Thus starts Joey's labyrinthine trek through joy and sorrow, hardship and wonder, as this simple horse becomes a remarkable hero, touching lives on all sides of the war with his innocence, purity of motive, and unconditional devotion to his human friends. He pulls battlefield ambulances, whisks away German soldiers on the run, fires the imagination of a French girl and hauls colossal cannons up mountains. Albert heads into the trenches on his own perilous mission, Joey finds himself ensnared in the haunting No Man's Land between British and German territory. But even when it seems there can be no return, he sets in motion a momentary chance for peace and holds fast to a dream of reunion and renewal.