In her debut as a singer, Maria II accidentally invents striptease, an action that lets the circus achieve great fame. Shortly afterwards the Marias meet Florès (George Hamilton), a socialist revolutionary. He invites them to join his cause, a revolution against "El Dictador" (José Ángel Espinoza). But Florès is soon shot. On his deathbed he makes Maria I promise to carry through with his cause and she agrees. Though at first reluctant to acquiesce to Florès' and Maria I's endeavor, Maria II joins the cause when she comes to the aid of her vulnerable friend.