When Dr. Brinkley arrives in the tiny Mexican border town of Corazón de la Fuente claiming to have a cure for male impotence, he builds a giant radio tower to broadcast his services. The town's fortunes change overnight, though not all for the good. Corazón attracts the attention of the criminal-minded while the doctor attracts the affections of the town's most beautiful citizen. But an unlikely group of townspeople bands together to fight back.