Spain, 1950s. Montse's agoraphobia keeps her locked in a sinister apartment in Madrid and her only link to reality is the little sister she lost her youth raising. But one day, a reckless young neighbor, Carlos, falls down the stairwell and drags himself to their door. Someone has entered the shrew's nest... perhaps he'll never leave.
- Genre: Horror, Thriller, Drama
- Studio: Canal+ España, Pokeepsie Films, Nadie es Perfecto
- Keyword: poison, pregnancy, hallucination, flashback, murder, neighbor, agoraphobia, madness, mental health, hidden
- Cast: Macarena Gómez, Nadia de Santiago, Hugo Silva, Luis Tosar, Gracia Olayo, Lucía de la Fuente