Marta settles into his new apartment with his partner. But that night is bound to be alone. The building is newly built and have barely begun to change the first neighbors. All is silent, empty - until someone knocks the door violently.

一场诡异意外造成多数同学丧生，倖存的爱儿玛也失去记忆，她不仅得试著拼凑出当天的情况，还要设法想起自己的身分。

One weekend, after years without seeing each other, several friends, over whom hangs the shadow of a murky episode of the past, meet in a house in the mountains. During the first night, a strange incident takes place that leaves them isolated.

2017 film by Sergio G. Sánchez

2012 film directed by Juan Antonio Bayona

2007 Spanish-Mexican horror film directed by Juan Antonio Bayona