After the events of the summer of 1989, Beverly has grown up and become a fashion designer in New York, while having gone through numerous abusive relationships over the years, including her marriage to Tom Rogan, who considers her a sex object. When she gets a phone call from Mike to return to Derry, he questions her about who she was talking to; she tells him that Mike is just an old friend from her childhood. Tom ultimately gets confrontational and violent with Beverly, which causes her to pack up her things and leave, taking off her wedding ring to show that she’s through with him. Upon returning to Derry and coming to a Chinese restaurant, Ben, who has become an architect and lost weight in the past twenty-seven years, greets her with the same words she used when they first met, which causes her to recognize him; she is very surprised and happy to see him again. As they’re having dinner, Mike reminds them of the summer of 1989, as their recollection of Pennywise has waned due to being away from Derry for so long. Soon enough, they begin to have hallucinations and find out about Stan’s suicide after Beverly calls his wife. She also reveals that after being exposed to It’s true form, the deadlights, she has been having visions of them dying if they leave Derry without keeping their childhood vow, to which Mike says the deadlights are like a virus. Fortunately, Mike tells them that a Native American tribe’s Ritual of Chüd can destroy Pennywise forever. They just need to find seven artifacts from their childhood, one of which is Stan’s shower cap in their old underground clubhouse. To find the rest of the items they seek, they try to recap what they did during the time that they were divided after their first visit to the Well House. Beverly finds herself going back to her childhood home, now inhabited by a friendly old woman named Mrs. Kersh, whom she has tea with, where she finds her relic, the poetic love letter Ben wrote to her, though she thinks Bill wrote it. Mrs. Kersh then turns out to be Pennywise in disguise; Beverly barely escapes. After Bill fails to save another kid from being killed by Pennywise, he journeys to the Well House to face It alone, though Beverly and the others persuade him to allow them to help out. The six are separated and tormented for Pennywise, who carves words on Ben’s stomach, though Beverly stops him by shattering the mirror, causing the words to vanish. They also fight off a spider-like version of Stan’s head. They then descend into the well, back down to Pennywise’s Lair, where they find a new passage leading deeper down into a cave, the very location where It arrived on Earth long ago. After failing to kill him using the Ritual of Chüd, Pennywise takes the shape of a gigantic spider and chases the Losers around the cave, trapping Beverly in a bathroom stall and attempting to drown her in blood. Luckily, she manages to escape as Ben finally reveals to her that he wrote the love letter to her while she saves him from being buried in the Losers' clubhouse. Upon realizing they can exploit Pennywise requiring a physical form and how they see him, they mock him, causing him to shrink until he gets small enough for them to rip his heart out and crush it, finally killing the demon, at the cost of Eddie’s life, as he sacrificed himself to save Richie. The surviving members of the group flee as the cave and the Well House collapse. They then go to the lake to get cleaned up and go for a swim. Sometime later, Ben and Beverly get married, and they are shown on a sailboat with a pet dog.