After participating in a séance, young Laura begins to behave strangely. Alarmed, her parents ask Father Olmedo, one of the few exorcists authorized by the Vatican to intervene in cases of demonic possession, for help.
| Actor | Role |
|---|---|
 María RomanillosLaura | Laura |
 Ruth DíazCarmen | Carmen |
 Urko OlazábalTomás | Tomás |
| PPablo RevueltaJesús | Jesús |
 José SacristánPadre Olmedo | Padre Olmedo |
| DDaniela BiniNiña Demonio | Niña Demonio |
 Cristina CastañoAsunción | Asunción |
 Silma LópezLola | Lola |
 Daniel AriasEnrique | Enrique |
 Alícia FalcóMireia | Mireia |
 Uri GuitartArturo | Arturo |
| JJosé TorijaDemonio | Demonio |
 Alfonso DelgadoProfesor Arte | Profesor Arte |
| FFernando OyagüezProfesor Luis | Profesor Luis |
| PPaula CereixoTécnica de Resonancia | Técnica de Resonancia |
| LLupe Cartié RodaDoctora Oliva | Doctora Oliva |
| NNerea BreyEnfermera Pool | Enfermera Pool |
 Adela LeiroJueza | Jueza |