With World War I looming, young U.S. Army doughboy Robert Conroy (Logan Lerman) has his life forever changed when a little dog with a stubby tail wanders into camp, as the men of the 102nd Infantry Regiment, 26th Infantry Division train on the parade grounds of Yale University. Conroy gives his new friend a name, a family, and a chance to embark on the adventure that would define a century.
Despite lacking formal military working dog training, Stubby and his human companions find themselves in the trenches of the Western Front in France and on the path to history. French poilu Gaston Baptiste (Gérard Depardieu) befriends the duo, and accompanies them along their epic journey through harsh conditions and incredible acts of courage.
As narrated by Robert’s sister Margaret (Helena Bonham Carter), Stubby’s combat service includes sniffing incoming gas attacks, finding wounded allies in No Man’s Land, and even catching a German infiltrator in the trenches. Back home, Stubby’s exploits are retold in newspapers across the country.
For his valorous actions, Stubby is still recognized as the most decorated dog in American history and the first canine ever promoted to the rank of Sergeant in the United States Army.