A group of college students, led by Claudia, decide to investigate a local tower that has figured prominently in disturbing reoccurring dreams Claudia has been having. They are suspended from school for their antics, but Claudia learns from one of the female staff members that the person in the dream is a student who killed herself years before and that the headmistress has seen her ghost.

In 1965 Mexico City, Flavia, a wealthy yet lonely schoolgirl, befriends Veronica, a young orphan girl who has a fascination with witchcraft. Veronica convinces Flavia that she is a real witch and forces her to be her assistant. The children's games gradually become more serious and Veronica demands more from Flavia.

When four women move into an old house left by one woman's aunt, strange things begin to happen. Bizarre voices, visions of ghosts, and mysterious noises lead them to discover the darkest powers of evil and a horror and agony beyond terror.

Two humble indigenous woodcutters discover the wreckage of a plane that has crashed at the top of the mountains and decide to steal the belongings of all the occupants killed in the accident.

Julia, a governess, comes to work for a bourgeois family that lives in a forested property they have recently bought. Julia is to take care of a little girl named Silvia, whose unusual demeanor may find its roots in the family garden.