A vile woman has a change of attitude and starts helping a scientist who deliberately infects himself to test the efficacy of a vaccine.
| Actor | Role |
|---|---|
 Laura HidalgoMaría Magdalena Da Silva | María Magdalena Da Silva |
 Francisco Martínez AllendeProf. David Guimaraes | Prof. David Guimaraes |
 Ricardo Castro RíosRómulo Buarque | Rómulo Buarque |
 Homero CárpenaCairo Bendo | Cairo Bendo |
 Luis DávilaJuan | Juan |
 José María GutiérrezLázaro Da Silva | Lázaro Da Silva |
 María Concepción CésarJuana Buarque | Juana Buarque |
| BBlanca TapiaMartha Da Silva | Martha Da Silva |
 Ricardo GalacheDr. Pedro Simón | Dr. Pedro Simón |
| CCarlos BianquetNot listed | Not listed |
| PPascual NacarattiDr. Jacob | Dr. Jacob |
 Alejandro MaximinoPadre Bautista | Padre Bautista |
 Enrique FavaAndrés | Andrés |
 Alberto BarcelNot listed | Not listed |
 Pablo MoretMatias | Matias |