Sister Marina, a very unorthodox nun, is sent during the summer of 1994 to El Parral, a boarding school for boys threatened to be closed soon. Even though the kids welcome Marina with all kinds of pranks, they will, little by little, become something very close to the family they never had.
| Actor | Role |
|---|---|
 Carmen MachiSister Marina | Sister Marina |
 Paula UseroSister Angelines | Sister Angelines |
 Doroftei AnisSister Tatiana | Sister Tatiana |
 Nuria GonzálezMother Superior | Mother Superior |
 Pablo ChiapellaRafa | Rafa |
 Manolo SoloVicar | Vicar |
 Dairon TallonValdo | Valdo |
| AAdrián LópezSebas | Sebas |
 Pau MárquezBichi | Bichi |
 Adrián MarínRachid | Rachid |
| DDiego NeiraJasón | Jasón |
| DDiego MuñozTomás | Tomás |
| DDivine OgbeborEbaué | Ebaué |
| VVíctor PonsDimitri | Dimitri |
| ÁÁlex BoquizoWalter | Walter |
| RRubén PonsIván | Iván |
| NNacho BlatGambita | Gambita |
 Neus AgullóSister Josefa | Sister Josefa |
 Carme CapdetSister Lourdes | Sister Lourdes |
 Berna LlobellBishop | Bishop |
| EEric MartínLentejo | Lentejo |
| ÁÁlvaro SelvaBlond boy | Blond boy |
| JJuan SelvaHandsome boy | Handsome boy |
| JJordan BlascoReferee match #1 | Referee match #1 |
| IIria MárquezPretty girl's mother | Pretty girl's mother |
 César TormoPet shop owner | Pet shop owner |
 Enrique VictoriaNeighbor #1 | Neighbor #1 |
 Paco TrenzanoNeighbor #2 | Neighbor #2 |
| HHugo RubertShowman | Showman |
 Luis EnriqueHimself (archive footage) | Himself (archive footage) |