As a dense fog engulfs the town – and General Shaw pushes ahead with his mission – the Hanlons, Rose, Dick, and the kids must work together to save Derry.

A vigilante attack on the Black Spot unleashes long dormant forces. In the aftermath, Dick helps uncover another crucial artifact.

Plagued by dark visions, Dick gets a surprise at the Black Spot. Meanwhile, the kids each face their own challenges.

As the military descends on Neibolt Street, the kids head into the sewers with their own objective.

As the kids face increasingly terrifying experiences, Charlotte attempts to advocate for Hank, and General Shaw escalates his efforts.

When a major find yields few clues, General Shaw pushes ahead with his top-secret mission, ordering Leroy and Pauly to escort Dick Hallorann on an aerial search for a new dig site. Meanwhile, Rose attends a tribal meeting about the military presence in Derry, and Ronnie, Lilly, Will, and Rich attempt to get visual proof by conjuring an Orixá.

After joining Leroy at their new house in Derry, Charlotte is left with a strange feeling while running errands in town, and Will is teased on his first day of school. Later, Lilly faces pressure from all sides about what really happened at the movie theater, and Ronnie worries about her father's fate.

Four months after their classmate's sudden disappearance, Teddy, Phil, Lilly, and Ronnie vow to figure out why so many kids have gone missing in Derry...and why they've each been experiencing strange phenomena. Meanwhile, Major Leroy Hanlon arrives at Derry Air Force Base, where he navigates a chilly reception from some of his fellow airmen.