La hermosa Piedad llora la muerte de su padre, a quien amó por encima de lo normal. (FILMAFFINITY)

Emma is a teenager when she is the victim of a terrible road accident in London, and needs psychiatric care after she suffers from resulting brain injury. Her mother, Silvia, confines her in the house, and Emma's personality becomes aggressive, leading to a regrettable series of violent deaths.

The death of Sebastian's father engenders in him pathological fears and hallucinations. His death wishes seem to cause horrible accidents, which he is unable to control. When his older brother dies, he feels that he has caused it. He undergoes hypnosis, but his apparent supernatural powers continue. As his own life nears its end, he becomes even more violent and sadistic.

A group of teenagers take refuge in an old, deserted mansion. Soon the members of the group start turning up dead, and the teenagers realize that they're not alone in the mansion.