Buried Secrets

Mary's spirit targets Annalisse because she is a newcomer to the house and possesses the ability to sense and communicate with the supernatural. Additionally, Annalisse begins investigating Mary's disappearance and the death of Mary's mother, which draws Mary to her. Mary needs someone to uncover the truth about what happened to her, and Annalisse becomes her vessel for confronting the past.

Early in the film, Annalisse experiences vivid nightmares about a woman falling from a cliff, hinting at Mary's traumatic death.

Danielle manipulates Laura into having Annalisse committed because she fears Annalisse is getting too close to discovering the truth about Mary's disappearance and Ann's death. Danielle had been drugging Mary and was involved in her death, so she wants to silence anyone who might uncover her crimes. Having Annalisse institutionalized removes her from the investigation and reinforces the family's belief that Annalisse is mentally unstable.

Danielle suggests Annalisse may be suffering from the same mental illness as Mary, planting the seed for commitment.

Mary died by falling from a cliff. Clay later reveals he buried her body at the cliff after believing she had murdered her mother, Ann. The truth emerges that Danielle was actually responsible for Ann's death and had been drugging Mary to manipulate her, making Mary believe she was responsible for her mother's death.

Annalisse's nightmares depict a woman plunging from a cliff, directly foreshadowing Mary's method of death.

Ann Roff was murdered by Danielle. The investigation reveals that Danielle had been treating and drugging Mary, and she killed Ann to further her control over the family. Danielle then manipulated Mary into believing she was responsible for her mother's death, which contributed to Mary's mental state and eventual death.

The supernatural tension escalates as Annalisse uncovers that Mary's disappearance and Ann's death are connected.

Clay buries Mary's body by the cliff because he believed she had murdered her mother, Ann. Overwhelmed by grief and believing his daughter was a murderer, Clay hid her body rather than report the death to authorities. This secret haunts him throughout the story and ultimately contributes to his decision to take his own life when the truth is revealed.

Clay's secretive behavior and resistance to discussing Mary's disappearance hint at his involvement.

Danielle is killed when Mary's spirit possesses Annalisse and uses her body to ride Mary's beloved horse. During the possession, the horse tramples Danielle, delivering a deadly blow. This supernatural intervention serves as payback for Danielle's role in Mary's and Ann's deaths.

Mary's spirit intensifies its presence and wrath, particularly after Annalisse defies warnings to stay away from Johnny.

Clay commits suicide after being forced to confront the devastating truth that Danielle murdered his wife Ann, not Mary. He also learns that Danielle had been drugging Mary and manipulating the entire situation. Overwhelmed by guilt for having buried his innocent daughter and lived with Danielle's lies, Clay takes his own life.

The revelation of Danielle's crimes and manipulation shatters Clay's understanding of his family's history.

Danielle's motive stems from her affair with Clay and her ambition to marry him. She was pregnant with Clay's child and wanted to remove Ann (his current wife) from the picture. By killing Ann and drugging Mary into a psychotic state, Danielle eliminated her obstacles and positioned herself to become Clay's wife, which she successfully achieves.

Danielle's push to have Annalisse committed mirrors her earlier tactics against Mary.

Mary's spirit becomes angry when Annalisse pursues a relationship with Johnny Toussard because the spirit is protective and jealous, viewing Annalisse as her chosen vessel for uncovering the truth. Additionally, Mary's spirit is driven by unresolved anger and pain, and any perceived betrayal or distraction from her mission triggers her wrath. The romance destabilizes the tense atmosphere and threatens to divert Annalisse from the investigation.

Clay warns Annalisse to stay away from Johnny, hinting at the danger this relationship poses.

Mary's spirit is able to possess Annalisse because Annalisse is spiritually sensitive and already connected to the supernatural through her nightmares and visions. As Annalisse investigates Mary's death and draws closer to the truth, she becomes more vulnerable to possession. Mary uses Annalisse as a vessel to physically confront Johnny and her father Clay, and to carry out vengeance against Danielle.

The increasing intensity of Annalisse's nightmares and the growing presence of Mary's spirit pave the way for full possession.

While the specific drug is not named in the summary, Danielle was treating Mary and administering medication that caused her to experience psychotic symptoms. This drugging manipulated Mary into believing she had murdered her mother, keeping Mary silent and controllable. Danielle uses the same tactic against Annalisse, attempting to drug her to keep her quiet about the discoveries she makes.

Danielle's medical background and access to treatment provide her with the means to drug both Mary and later Annalisse.