Beverly Ross (nn Miller) is a would-be radio personality, but the closest she gets to being on the air is running the switchboard at a local station. Worse yet, the blustery station owner Mr. Kennedy (Tim Ryan) wants no part of programming "jive" (i.e., swing music) that she loves, preferring the classics. But she manages to con Vernon Lewis (Franlin Pangborn), the host of the station's early morning classical show, into believing that he needs a vacation and slips into his time-slot at 5 am, where she starts running records by Bob Crosby's band, Duke Ellington, Count Basie, and Frank Sinatra in place of Beethoven and Mendelssohn. The soldiers at the local army base pick up on the new show, and two of them, wealthy candy company magnate Barry Lang (William Wright) and his former chauffeur Andy Adams (Dick Purcell, decide they want to meet this new disc jockey, and as luck would have it her brother (Larry Parks) is in their platoon and invites them to his home. But the two men decide to switch identities, Barry denying his wealth and pretending to be Andy, and Andy presenting himself as the candy heir Barry -- and as if matters aren't complicated enough for Beverly, coping with their antics, she has to fight to keep her radio show. But when the soldiers listening to her start writing in by the thousands, and Barry suggests she call her 5am show "Reveille," she takes it one step further and "Reveille With Beverly," and becomes a smash. But can she sort out the intertwining romantic overtures of the two men in her life?