Karem the Possession

In 1984 in the pursuit of a work opportunity, the Briseño, an atheist family, moves from the United States to Durango, Mexico, to their new home, a manor believed haunted; after the mysterious death of the previous owners. Karem, the youngest daughter, hears mutters from the basement, but she only finds a toy. The next day Karem is bullied by her classmates because of her status as the new girl in school and her atheist philosophy. Isolated in her room without telling her parents of her experience, Karem contact through her diary with an invisible entity who presents himself as Naro. He wants to befriend her, exposing his knowledge of her bullies and offering his help. He grants her psych abilities[4] from that day Karem can use a form of telekinesis.

As a side effect of her new powers, Karem's personality transitions from being shy and self-restrained to explosive and aggressive, which causes her teacher Clarissa to ground her when she yells at her in class. That day the Briseño are visited by Father Miguel, a priest who learns something odd about them after talking with Karem and recalls the incident with the previous family who lived there. His investigation of the manor leads him to unravel Naro's existence, a dreadful demon who granted abilities to the youngest son of another family and caused the death of everyone when he was confronted by the rest of the family. Miguel reports to his superior in order of helping the family as soon as possible due to Abraham, the family patriarch refusing to believe his warnings even though his wife Mariana and the rest of his children try to convince him something is not right about their home.

After Fabiola, one of Karem's bullies gets sick and regurgitates blood with paper, the rest of her classmates Elizabeth and Adriana confront Karem accusing her of Fabiola's status. Karem in response attacks and kills them with help of her powers and she also injures Clarissa when she enters the classroom trying to help the girls. The murders suspend the classes, Karem then persuades her eldest sister Laura of taking her with Clarissa to the hospital to "visit her". However, as Clarissa is still in intensive care Karem and Laura visit Fabiola instead. Once both girls are left alone, a weak Fabiola tries to apologize to Karem but she refuses to listen and finishes her off posing her death as an unexpected medical complication.

That night Laura is possessed by Karem, who manipulates her actions to make her kill Clarissa when she smothers her with a pillow at the hospital. Due to Laura being free of the possession as soon as Clarissa dies, Laura is arrested for the murder of the teacher. Hearing his sister was arrested, Karem reproaches Naro for the consequences of her actions and tries to cut ties with him, but he refuses and takes over her and his brother Eduardo's bodies. On his way to the manor, both Abraham and Mariana are approached by Miguel who offers their help with Karem. Inside the manor, they witness supernatural phenomena like poltergeists, and Naro himself manifests as a boy carbonized. Mariana reaches out to Karem in her room where the girl fully controlled by Naro kill her mother. Eventually, a Cardinal with other priests arrives at the manor for helping the family. A possessed Eduardo attacks them with demonic powers while the cardinal tries to exorcism Naro out of his body which causes the boy's death when the demon tears off his arms in front of an impotent Abraham. Naro then takes control over both Mariana and Abraham to force them to attack the priest and Miguel which causes the death of the last two as the cardinal exorcism out Naro from Mariana's corpse. With just the cardinal left alive in the manor, Karem attacks him as he performs an exorcism for saving her and stabs her in the stomach during the ritual. The church covers the incident with the Briseño, takes Karem into custody, and locks away Karem's diary inside a vault. Sometime later, Laura is contacted in her cell by Naro as she smiles reading his message.

In a mid-credits scene Karem is taken by a nun to a room where she is lobotomized, presumably to prevent her from being used by Naro and her psych abilities again.

• Daniel Martinez as Abraham Briseño
• Dominika Paleta as Mariana Briseño
• Raquel Rodriguez as Karem Briseño
• Miranda Kay as Laura Briseño
• Gregorio Urquijo as Eduardo Briseño[5]

The film is a co-production of L'maneto Films with Videocine from Rigoberto Castañeda.[6] Originally actress Miranda Kay was cast for the role of eponymous Karem Briseño, however as the film took around 6 years to be made, she was eventually cast as the eldest daughter instead.[2] Photography director Junichiro Hayashi took the job after film director Henry Bedwell send him the script and traveled to Mexico for the shooting stage.[2]

Principal photography began in 2019 on Durango, Mexico and it is based on a real-life case of demonic possession of Mexico, Durango. However Bedwell only used the case as an inspiration for the plot of the film that is mainly fictitious.[7] Some scenes were filmed in real locations of Durango like Velatorio "El Sabino", Elementary School Guadalupe Victoria and Museum art Guillermo Ceniceros.[8] Film director felt Durango state allowed the film crew to work freely due the state is used for filming projects.[9]

The film premiere was held at Durango on December 7th, 2021[9] during film festival "Feratum 2021".[10] About a month before its scheduled premiere date on December 30.[1] As most of the films made during 2019-2020 season on Mexico, the film was delayed from his original 2020 release date. The official date was chosen to be in December for the movie to be released in 2021.[9]

• Karem, la posesión at IMDb