A television reporter and cameraman follow emergency workers into a dark apartment building and are quickly locked inside with something terrifying.

César, an unhappy concierge, maintains a peculiar relationship with the very diverse inhabitants of the upper-class apartment building where he works in Barcelona.

Haunted by memories of a patient's death, a nurse takes a job at an antiquated hospital for children. Soon she learns that the kids fear a ghost that prowls the floors and will not allow anyone to leave. Amy tries to protect them and convince the other staffers of the evil that lurks there.

A teenage girl moves into a remote countryside house with her family, only to discover that their gloomy new home has a horrifying past that threatens to destroy the family.

Ángela Vidal, the young television reporter who entered the building with the firemen, manages to make it out alive. But what the soldiers don't know is that she carries the seed of the strange infection. She is to be taken to a provisional quarantine facility, a high-security installation where she will have to stay in isolation for s...