A failed pianist sells his soul to the devil in return for his becoming the greatest musician in the world. The catch: every time he plays he turns into a horrible monster.

• Cinematográfica ABSA
• Enrique Rambal
• Martha Roth
• Abel Salazar
• Ofelia Guilmáin
• José Chávez
• Maricarmen Vela
• Carlos Suárez
• Ana Laura Baledón