Movie Insidious: The Last Key (2018) description:
The creator of the American popular horror franchise “Insidious”, screenwriter Lee Wonnell, who wrote the plot of the entire previous trilogy and became director and screenwriter of the third painting, is producing the fourth part of the film, which will be a continuation of the theme of the afterlife. As you remember, the first two parts dealt with a child who, not of his own free will, became the link between the worlds of the dead and the living.
Josh and Renee, almost losing her son in the first film (2010), after a coma and instilling in him a demonic, ghostly essence, in the sequel of 2013 are trying to unravel the mystery of the terrible events of the past. The journey for his son did not pass without a trace for Josh. He himself, unaware of this, became the bearer of the otherworldly entity, then escaped to freedom.
In the third part, the psychic woman, Alice Reiner, the encounters of the world of spirits. The fourth part will be the sequel to the previous one and will be the same with Al Shin, still trying to fight the evil spirits and demons, helping people and revealing to the viewer the secrets of the afterlife .
Lin Shaye, Leigh Whannell, Angus Sampson