Veronica (2017)

The film opens in medias res, with emergency services responding to a call from a young girl made on June 15, 1991. She sounds panicked and screams about something coming to get her brother before the call cuts off. The film goes back in time three days.

Fifteen-year-old Verónica lives with her family in the working-class district of Vallecas, Madrid. After her father's death, her mother works long hours to support the family, leaving Verónica in charge of her younger siblings: twins Lucia and Irene, and Antoñito.

On the day of the 1991 solar eclipse, her teacher explains how some ancient cultures used eclipses to stage human sacrifices and summon dark spirits. Later, in the school basement, Verónica and her friends Rosa and Diana conduct a séance with a Ouija board. Verónica wants to reach out to her late father, and Diana her late boyfriend who died in a motorcycle accident. The glass cup suddenly becomes too hot, prompting Rosa and Diana to pull their hands back. The moment the eclipse occurs, the cup shatters, cutting Verónica's finger and her blood drips onto the board. Verónica becomes unresponsive, whispering something repeatedly, then lets out a demonic scream. She wakes in the school nurse's office, who tells her she probably passed out from iron deficiency.

Verónica begins experiencing paranormal occurrences and her friends avoid her. She goes back to the school basement and finds the school's elderly blind nun nicknamed Hermana Muerte ('Sister Death') by the students. The nun explains that the séance attached a dark spirit to her. She unsuccessfully compels the spirit to leave. She instructed Verónica to protect her sibling from the entity.

Verónica draws protective Viking symbols for the kids, only for the demon to destroy them. She intervenes when the spirit chokes Lucia, only to learn that she herself was choking Lucia. Verónica wakes up to find that she's on her first period. As she scrubs her mattress, she finds burn marks on the underside. She also finds on each of the kids' mattresses a large burn mark in the shape of a human body. Sister Death tells Verónica that she used to see dark spirits when she was younger, and intentionally blinded herself in an unsuccessful attempt to stop the visions. Verónica reads in an occult magazine that she can force the spirits to leave by doing right what she did wrong as it is important to say goodbye to the spirit at the end of a séance. Verónica asks Rosa and Diana to hold another séance, but they refuse. Rosa reveals that at the séance, Verónica whispered that she herself would die in three days.

Desperate, Verónica decides to hold the séance with her siblings. She has Antoñito draw the protective symbols on the walls, but he incorrectly copies the symbols of invocation. During the séance, they have to repeatedly sing a melody and decide on the advertising jingle for "Centella," the only song they all know. When Verónica tells the spirit to say goodbye, it refuses. She calls the police and escapes with her siblings. However, she sees that she is not actually holding Antoñito but had imagined it. Her brother is actually hiding in a closet. She finds Antoñito but he refuse go with her. Verónica looks at herself in the mirror and sees the demon, realizing she has been possessed by the demon the entire time, and had been harming her siblings under its control. She attempts to end the possession by slitting her own throat but is prevented by the demon. The police enter to find her being attacked by an invisible force, partially levitating and passing out. The medics carry her and Antoñito out while a shaken detective observes the scene. As the detective watches a photograph of Verónica suddenly catch fire, he is informed that she has died.

In his official report, he mentions unexplained paranormal activity having occurred in the house. It is explained that the movie is based on the true events of the first police report in Spain where a police officer certifies having witnessed paranormal activity.