Chief Inspector Armand Gamache of the Sûreté du Québec is called to investigate the death of a villager at an Easter séance that was held at the Old Hadley House.

Winter 1917. As the First World War enters its most brutal phase, back home in England, everyone is seeking answers to the darkness that has seeped into their lives. At Blackwater Abbey, on an island off the Devon coast, armaments manufacturer Lord Highmount has arranged a spiritualist gathering to contact his two sons, both of whom died at the front. Among the guests, two have been secretly dispatched from the intelligence service: Kate Cartwright,...

Best selling crime novelist Charles suffers from terrible writer's block and is struggling to finish his first screenplay. His picture-perfect new wife Ruth is doing her best to keep him focused so they can fulfill her dream of leaving London for Hollywood. Charles' quest for inspiration leads him to invite the eccentric mystic Madame Acarti to perform a seþance in his home. He gets more than he bargained for when Madame Acarti inadvertently summons...

Six friends hire a medium to conduct a séance during lockdown for their weekly Zoom call. Jemma decides to pull a prank and makes up a story about a boy she knew in high school who hung himself. By doing this, Jemma inadvertently invites a demonic presence to cross over. Soon the friends begin noticing strange occurrences in their homes as the evil spirit begins to make itself known, and they all realize this night may be their last.