To win the prize that is offered to the one who endures three laps to a boxer, a mechanic learns to box and becomes champion; in the meantime he gets involved with a woman but eventually returns to his wife.
| Actor | Role |
|---|---|
| IIván CaserosNot listed | Not listed |
 Nury MontséNot listed | Not listed |
| JJosé MazilliNot listed | Not listed |
 Perla MaryNot listed | Not listed |
 Héctor CalcañoNot listed | Not listed |
| LLuis Elías SojitNot listed | Not listed |
| TTito SoriaNot listed | Not listed |
| JJacinto InviernoNot listed | Not listed |
| HHumberto SavoiaNot listed | Not listed |