Ed and Lorraine Warren travel to North London to help a single mother raising four children alone in a house plagued by a supernatural spirit.
Skeptical female clinical psychologist Kristen Bouchard joins a priest-in-training and a blue-collar contractor as they investigate supposed miracles, demonic possessions, and other extraordinary occurrences to see if there’s a scientific explanation or if something truly supernatural is at work.
Young couple Katie and Micah move to a new house in San Diego. Katie claims an evil presence has been haunting her since she was a child, so Micah sets up a camera in their bedroom to record any paranormal activity that occurs while they sleep. A famous psychic Dr. Fredrichs, who reveals that Katie is being haunted by a demon that feeds off the negative energy and is intent on tormenting Katie, advises them not to communicate with the demon and to contact Demonology Dr. Johann Averies if needed. Katie seems interested, but Micah does not take this seriously.
Father Tomas Ortega is the new face of the Catholic Church: progressive, ambitious and compassionate. He runs a small, but loyal, parish in the suburbs of Chicago. Father Marcus Keane is a modern-day Templar Knight, an orphan raised since childhood by the Vatican to wage war against its enemies. Marcus is everything Tomas is not: relentless, abrasive and utterly consumed by his mission – and he constantly butts heads with his adversary within the church, Father Bennett.
In 1967 in Santa Monica, California, John Form, a doctor, presents his expectant wife Mia with a rare vintage porcelain doll as a gift for their first child to be placed in a collection of dolls in their daughter's nursery.