A squad of young Cuban armed forces recruits are tasked with defending a strategic key north of Cuba. The fraught relationships between the young soldiers and the sergeant who leads them transform as they discover his human qualities during training and learn discipline in the harsh conditions of their post.
| Actor | Role |
|---|---|
| TTito JuncoSgt. Margarito Soler | Sgt. Margarito Soler |
| PPatricio WoodNot listed | Not listed |
| JJavier GonzálezNot listed | Not listed |
| SSalvador BlancoNot listed | Not listed |
| MMaribel RodríguezNot listed | Not listed |
| JJorge EspinosaNot listed | Not listed |
 Alberto PujolNot listed | Not listed |
| JJuan RivasNot listed | Not listed |
| AAntonio ArroyoNot listed | Not listed |
| IIdalia AnreusNot listed | Not listed |
| AAlejandro LugoNot listed | Not listed |
| LLuis LloroNot listed | Not listed |
| LLuis Alberto GarcíaNot listed | Not listed |
 Luis RieloNot listed | Not listed |