Boomika Ending Explained (Spoilers)

Paranormal activity at a lush, abandoned property alarm a group eager to redevelop the site, but the eerie events may not be as unearthly as they think.

Boomika: Spoilers Below

A man drives home to Nagapattinam to visit his pregnant wife. While he talks on the phone with her about a construction deal he recently concluded, an oncoming truck collides with his car, killing him.

Meanwhile, Samyuktha "Sam" - a psychologist based in Ooty, seeks medical therapy for her 4-year-old son - Siddhu, who has a speech impediment. Gautham, her husband, is a rising architect who has just concluded a deal to refurbish a deserted compound for a politician. In an attempt to focus on the project, the couple invites Gautham's childhood friend and reputable architect Gayathri and Gautham's sister Aditi to live in the compound with them.

Gayathri begins texting with her old friend Krishna while preparing to stay at the compound for the night. She sends a selfie of Aditi and herself to him, and he eerily replies that if they "begin to take things more seriously," he too will be seen in the picture. However, Gautham reveals that phones don't get satellite connectivity at the compound and that the previous night Krishna died in a car accident. More paranormal activities begin to occur shortly after; Gayathri's phone regularly beeps with newer messages, despite removing its battery. The power blacks out. The group, horrified by recent events, attempts to flee, only for their car to be nonfunctional.

Sam and Gayathri, having retreated into the compound, deduce that the texts must have come from a paranormal source and not "Krishna" himself, given his death. Gautham tells her that the compound used to be a school that, because of supernatural occurrences after a girl's death - known infamously as the "Mount Roseyard School Mystery," has been abandoned for over ten years. While seeking clues about the school's history, the group discovers several magazines with articles relating to the mystery; the pages of the pieces are missing. Aditi attempts to flee, petrified of recent events, only for a pack of wild dogs to ambush her. Dharman - the compound's security guard, and Gautham save her; all get injured. They discover the torn pages in the house of the school's former librarian while treating Aditi.

The group reads the pages and learns that the girl in question, Boomika - was the autistic daughter of the librarian, Ganesan. Boomika - an exceptionally talented artist, and a nature lover, was well-known for her incredible works of art. She spent her time either painting in an abandoned flat or relaxing in the forest nearby, despite her mother's wishes for her to pursue proper education. Finally, the school admitted her; however, she died mysteriously afterward. After her death, the entire school and the surrounding residents were reported to have migrated elsewhere after multiple murders in the area.

Dharman says bizarrely that the Earth and Boomika "are the same" and will punish anyone who "desecrates it." Gayathri understands his view as the Gaia Hypothesis - that the Earth itself is a single, self-regulating organism, and other living forms thrive in a symbiotic relationship with it. The Earth will kill any organism which threatens to destabilize its ecological balance. Gautham sees the wall paintings moving in the abandoned flat that Boomika painted in. At the same time, a paranoid Aditi destroys Gayathri's phone, believing it to be the cause of the events. Gayathri follows her but suddenly stops when she sees what is presumably Boomika's ghost behind Aditi. "Boomika" knocks out both of them and chases Sam, who attempts to flee. However, Dharman creates a distraction but is knocked out. Sam and Gautham reunite; they rush back into the compound upon realizing that Siddhu was left behind. Sam finds Siddhu painting with "Boomika;" Siddhu utters "Thank You," indicating that he overcame his impediment before the ghost goes without harming him.

The group vacates the house, with "Boomika" presumably having left. After that night, Aditi is receiving therapy for trauma, Gayathri is recuperating from her injuries, Dharman has retreated to his hometown, and Siddhu has regained his ability to talk. Gautham stays in Ooty to focus on the refurbishment project; to prevent "Boomika" from returning, he cautiously conducts a bhumi puja (sacred rituals). Sam goes to Bengaluru to visit Gayathri, who tells her what really happened with Boomika's death; distraught with the then-ongoing infrastructure projects which threatened deforestation of the surrounding forests, Boomika committed suicide. Gayathri further reveals that Ganesan was intimidated into remaining silent. The murders that occurred in the aftermath of her death were all people related to construction activities. Gayathri realizes that Boomika's actions match the Gaia Hypothesis - "Boomika" murdered the construction workers who were destroying the environment, just as the Earth "kills" anything that threatens its ecological harmony. Sam rushes back to Ooty to save Gauthman. She was the one who persuaded Gauthman to continue with the project despite the paranormal events, and Krishna was the one who mediated the deal between the politician and Gauthman, resulting in Krishna's death in a car crash and the politician's death a while later.

Upon Sam's return to Ooty, a construction worker informs her that her husband is about to refurbish Boomika's abandoned flat. She is too late to save him; the flat's doors close and leave Gauthman trapped inside. Gautham witnesses the wall paintings moving again and sees "Boomika" in front of him. She screams before the screen cuts to black - implying that she will kill Gautham.

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