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.
| Actor | Role |
|---|---|
 Enrique RambalSamuel Magno | Samuel Magno |
 Martha RothLaura / Alejandra | Laura / Alejandra |
 Abel SalazarRicardo Souto | Ricardo Souto |
 Ofelia GuilmáinCornelia Magno | Cornelia Magno |
 José ChávezChief of Detectives | Chief of Detectives |
| MMaricarmen VelaBlond Motorist | Blond Motorist |
| CCarlos SuárezNot listed | Not listed |
| AAna Laura BaledónLittle Girl Piano Student | Little Girl Piano Student |
| AArmando GuttierezHotel Manager | Hotel Manager |
| CCecilia LegerNot listed | Not listed |
| JJesús GómezNot listed | Not listed |
 Anita BlanchNot listed | Not listed |