High-spirited Irish immigrant Marty Maher is an awkward misfit at West Point until he's taken in as an assistant by kindly athletic director Capt. Herman J. Koehler . A budding romance that turns into a happy marriage to a fellow Irish immigrant, housemaid Mary O'Donnell, also helps Maher mellow into a beloved and long-standing fixture at the military academy, where his career as an officer and mentor spans 50 years. This film is based on a true story.