At the beginning of World War II, bandleader Gil Whitney loses his featured singer, radio and film star Bob Reynolds, who enlists in the Army, even though he has been offered $4,000 per week by a film studio. Gil, however, refuses to enlist, as he refuses to be anything but a commissioned officer. After Bob departs for training camp, Gil argues with his arranger, Sammy Winkle, about one of Sammy's new arrangements. The bullish Gil bosses Sammy around so much that cigarette girl Peggy, who aspires to be a singer, offers her sympathy. Bob, meanwhile, finds army training camp rigorous, but has befriended former boxer Butch, and has told Butch that he is not the famous film and radio star, as Butch's girl friend threw him over because she was infatuated with the star. When Butch and Bob get in trouble with the sergeant, Bob loses his leave to see his girl friend, Rita Edwards, a singer with Gil's band, and asks her to visit him at camp. When Rita arrives, she finds Vicki, the daughter of socialite Flora Van Arsdale, fawning all over Bob, whom they have convinced to appear in a USO show for the camp. Rita refuses to hear Bob's explanation and later responds to Gil's romantic overtures. When Butch discovers that Bob lied about his identity, he picks a fight with him, although he is delighted by his new friend's talent. The next day, after the captain grants Bob and Butch twenty-four hours leave, the two go to see Rita so that Bob can plead for her forgiveness, but Butch gets into an argument with Gil after Gil insults Bob, and makes Rita even angrier. Sammy, who has fallen in love with Peggy, then quits to enlist in the Army, and the rest of the band joins him. Bob convinces the captain to arrange for the band to be enlisted together. When Bob's manager, Parky, shows Rita a newspaper photograph picturing Bob and Vicki together, he encourages Rita to fight for her man. Rita then joins the USO and is assigned to Bob's camp. Bob soon convinces her that he needs her, while Sammy convinces her to perform with them and replace the talentless Vicki, who has become involved in the show. After Gil receives a telegram informing him of his brother's death in combat, he rethinks his priorities and enlists. Sammy and the band then ask him to lead the group for the show, but the band never performs because their dress rehearsal is interrupted by orders to ship out.