Alejandro Silva is a 16-years-old boy who decides to leave his home, to go in search of brother, who have gone missing for some time. He embarks on the school-ship "Esmeralda". The adventures that Alejandro lives on his trip in search of his brother will mark his passage to adulthood.
| Actor | Role |
|---|---|
| GGonzalo MezaAlejandro Silva | Alejandro Silva |
| DDomingo TessierSargento Escobedo | Sargento Escobedo |
| JJuan Cristóbal SotoAlvarez | Alvarez |
| CCora DíazMamá | Mamá |
 Sergio Hernández(voice) | (voice) |
 Julio Jung(voice) | (voice) |
 Loreto Valenzuela(voice) | (voice) |
| AAlejandro Lyon(voice) | (voice) |
| JJosé Pedro Arana(voice) | (voice) |
| JJuan Enrique Benitez(voice) | (voice) |
| RRené Arias(voice) | (voice) |
| SSergio Garcia Valdés(voice) | (voice) |
| EEnrique HeineTuerto Anibal | Tuerto Anibal |
 Víctor MixEl Rata | El Rata |
| CCarlos RamirezEl Care Pato | El Care Pato |
| GGuillermo AltamiranoManuel | Manuel |
| AAlex LopezOficial de la Esmeralda | Oficial de la Esmeralda |
| GGuido DominguezOficial de la Esmeralda | Oficial de la Esmeralda |
| EEugenio ClaroOficial de la Esmeralda | Oficial de la Esmeralda |
| TTeresita RivasValentina | Valentina |