One of the "most poundingly suspenseful political thrillers ever made," (People Magazine) and "one of the best and brightest of modern American films" (Roger Ebert).

Ask Major Bennett Marco (Sinatra) and he'll say that Sergeant Raymond Shaw (Laurence Harvey) is a hero worthy of the Medal of Honor. But despite what he says, Marco suspects otherwise. A bizarre, recurring nightmare gives him the uneasy feeling that Shaw is something far less heroic and far more insidious. Is it possible that Shaw is a traitor? Can Marco convince the Army of his suspicions? How does Shaw's powermad mother (Lansbury) figure into this all? So many questions. So little precious time...