Val Eliot, an English city girl recruited to a farm as part of the war effort in the Women's Land Army, finds herself protecting a sheepdog named Peter Woodhouse rescued from the owner who mistreated him. When Val meets Mike, an American air force reconnaissance pilot stationed nearby, she realizes that the safest place for the little dog is alongside Mike at the base. Out of this kindness develops a love between Val and Mike that unfolds against the wartime obstacles of life-risking duty and distance. With the care and attention of the pilots, Peter Woodhouse becomes Dog First Class, the mascot of the US Air Force, boldly accompanying the officers in a Mosquito plane--until a disaster jeopardizes the future of them all. It is then that Peter Woodhouse draws Ubi, a German corporal, into their orbit, sparking a friendship that comes at great risk, but will pay the richest of rewards through the transition from war to peace time, and over the rest of their lives.