The Other Side of the Door (2016)

Maria Harwood has not recovered from the tragedy of losing her son Oliver, who drowned in a car accident in India. Maria instead rescued her daughter, Lucy, because Oliver's leg was trapped and Maria was unable to free it. Maria has been consumed by her guilt ever since. In the hospital following a suicide attempt, Maria is comforted by her housekeeper Piki. Piki asks Maria if she wants one final chance to say goodbye to Oliver. Piki explains that she has been in a similar predicament: she lost her own daughter in a drowning incident. According to Piki, there is an abandoned temple in her hometown where the barrier between the living and the dead is very thin. Maria must scatter her son's ashes at the temple steps and lock herself in. Oliver will speak to her once night falls. However, no matter what Oliver says, Maria must not open the temple door for him. Maria agrees and the pair have Oliver's body exhumed and burned. Maria notices some strange men covered in ash. Piki explains that they are Aghoris who consume the flesh of the dead and coat themselves in ash to strengthen their bonds between the worlds of the living and the dead.

The next day Maria arrives at the temple and follows Piki's instructions. Inside, she uncovers the mummified corpse of a woman. Night falls and Oliver begins talking to Maria. Maria apologizes to Oliver for leaving him. Oliver pleads with Maria to open the door but she explains that she cannot. When Oliver says he has to leave, Maria panics, wanting more time and opens the door, but sees no one. She returns home the next day. Now having closure, she focuses her attention on her husband, Michael, and Lucy but doesn't tell Piki that she opened the door. Strange things start happening: their piano plays itself and Lucy tells Maria that Oliver has come back and that he is hiding from someone. Lucy also tells Maria that she should not let Michael know about Oliver's return until Oliver is ready. In Oliver's room, a chair moves toward her along with a copy of The Jungle Book, which Maria had been reading to Oliver before the accident. Maria reads the book aloud. Piki notices that the nearby plants have started dying and realizes that Maria disobeyed her instructions.

Later, the decomposed body of Oliver appears near Lucy. Maria discovers a bloody bite mark on Lucy's shoulder when giving her a bath. Lucy, who was pleased with Oliver's return, tells Maria that she no longer likes Oliver. Maria tells Oliver that he musn't hurt Lucy. Oliver pulls out the chair and book again and Maria promises to read to him as long as he doesn't hurt Lucy. An aghori appears at the house and Maria is chased by the mummified body from the temple. Piki is outraged and confronts Maria; due to Maria's actions, Oliver's soul cannot reincarnate and has become evil. She reveals to Maria that the strange figure she has been seeing is Mrtyu, the gatekeeper of the underworld, who reclaims the errant souls of the dead. Piki urges Maria to burn all of Oliver's possessions to break his hold on the living world.

Oliver appears in the guise of Piki's dead daughter and lures Piki to a pond where he drowns her. Michael discovers Maria burning Oliver's possessions. He does not believe Maria's story, and Lucy suddenly denies any knowledge of Oliver returning. Maria realises that Oliver has possessed Lucy. Michael believes that Maria is becoming mentally unhinged and locks her in a room.

The aghoris crowd the house. The possessed Lucy kills the Harwood's dog with a knife and stabs Michael. Maria escapes the locked room and finds aghoris in Oliver's room chanting over Lucy's body. Unable to remove Oliver's spirit from Lucy, they plan to sacrifice her. Michael stops them and Maria commands Oliver to leave. Oliver says he is scared, but Maria says she will go with him. Oliver's spirit leaves Lucy's body and enters Maria's. She charges the aghoris and demands they take her instead. Their leader fatally stabs her. She falls and awakens in the room alone. Mrtyu appears and takes Maria to the afterlife.

Maria then wakes up and briefly believes that she is alive. She hears Michael's voice call out for her. She sees the temple steps and realises Michael is attempting the same ritual to bring back Maria as she did with Oliver. Maria screams for him not to open the door, but by not listening to it, this horror is repeated again.