Three girls from a small town win a trip to Monte Carlo. The trip was sponsored by their local newspaper, which sends along its ace reporter Bancroft as their "chaperone". Tony Townsend, an American on the lam from the police in Monte Carlo for skipping out on his hotel bills, registers at the same hotel where the girls are staying, and accidentally runs into one of them, Sally. To impress Sally he "borrows" the uniform of a prince who's staying in the next suite, and soon is mistaken by everyone for him. Unbeknownst to Tony, however, a gang of anarchists from the real prince's country are in town to assassinate him. Complications ensue.