Mario Morales (Ricardo Montalban) sought a career as a composer, though his celebrated matador father (Fortunio Bonanova) wanted him to continue the family trade... while the passion and skill for the cape had vested in his twin sister Maria (Esther Williams). When Mario storms off from a bullfight, will Maria's audacious bid to pose as him save the family name? Mary Astor, Cyd Charisse, Akim Tamiroff, John Carroll, Hugo Haas also star; score includes "La Bamba," "Romeria Vasca," "La Raspa."