Two strangers meet in a subway car. Both bring their past with them. Both look from their present. Both will determine their future in that fleeting, and ephemeral, vital journey that brings them together briefly.
| Actor | Role |
|---|---|
 Miguel RamiroMartín | Martín |
| JJosé CameánSergi | Sergi |
 José Luis de MadariagaMartín Anciano | Martín Anciano |
| NNorberto ArribasSergi Anciano | Sergi Anciano |
| CCiro MateosMartín Adolescente | Martín Adolescente |
| NNacho GonzálezSergi Adolescente / Adolescente Baño | Sergi Adolescente / Adolescente Baño |
| JJorge MencíaSergi 12 Años | Sergi 12 Años |
| PPedro HernándezCura | Cura |
| ÁÁlvaro Sanz RodríguezMartín Niño | Martín Niño |
| CCarla MurielPrima Martín | Prima Martín |
| ÁÁlvaro YustasSergi Niño | Sergi Niño |
 Manuel MoyaEnfermero | Enfermero |
| TTeresa MencíaAmiga Novia | Amiga Novia |