Music execs find out their songs are being pirated, so a detective and his assistant are hired to catch the culprits.
| Actor | Role |
|---|---|
 Cacho CastañaLucas Echeverry | Lucas Echeverry |
 Mónica GonzagaGloria | Gloria |
 Ricardo DarínEddie Ulmer | Eddie Ulmer |
 Stella Maris LanzaniFrancisca Luppo | Francisca Luppo |
 Carlos del BurgoRomeo Pérez | Romeo Pérez |
 Silvia PérezAngela | Angela |
 Sergio Velasco FerreroWalter Pardo | Walter Pardo |
 Arturo MalyDr. J.B. | Dr. J.B. |
 Tito MendozaLugosi | Lugosi |
 Marcos WoinskyOrejas | Orejas |
 Tincho ZabalaGuillermo Beaudine | Guillermo Beaudine |
 Adolfo AristarainVendedor de discos | Vendedor de discos |
| JJorge ChernovCantor de protesta | Cantor de protesta |
| EEnrique LatorreTomás Gómez | Tomás Gómez |
| EEnrique OtrantoSegundo de Lugosi | Segundo de Lugosi |
 José JoséNot listed | Not listed |
| AAlejandro ArandoNot listed | Not listed |
| GGonzalo AstorgaNot listed | Not listed |
| PPepe CanteroNot listed | Not listed |
| OOsvaldo CappiagiNot listed | Not listed |
| EEduardo RudermanNot listed | Not listed |
 Camilo SestoNot listed | Not listed |
| ÁÁngela CarrascoNot listed | Not listed |
 Franco SimoneNot listed | Not listed |
| AAlberto FerrósNot listed | Not listed |