It: Welcome to Derry

As four misfit kids vow to find their missing classmate, Major Leroy Hanlon arrives to a mixed reception at Derry Air Force Base.

While Charlotte and Will navigate their new life in Derry, Ronnie worries about her father's fate.

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.

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

After learning the truth about General Shaw's operation, Leroy decides to move his family to the base for safety. While the tribal Keepers strategize how to contain increased aggression in town, the military descends on Neibolt Street, and the kids head into the sewers with their own objective.

Plagued by increasingly dark visions, Dick learns the Black Spot is integral to Charlotte's plan. Meanwhile, Will faces his parents' disapproval for walking into a dangerous situation, Marge stands up to the Patty Cakes, and Lilly's behavior grows erratic.

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

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.