Pennywise the clown appears in a storm drain and tears off six-year-old George Denbrough's arm, killing him.

A clown is seen beneath a bridge killing Adrian Mellon, biting his armpit and squeezing until his ribs crack.

Stanley Uris receives Mike Hanlon's phone call and slashes his wrists in the bathtub, writing 'IT' in blood on the tiles.

Five of the original seven Losers return to Derry after receiving Mike Hanlon's calls about renewed child murders.

Bill and Richie crawl into 29 Neibolt Street and battle a werewolf, shooting it with a pistol and throwing sneezing powder.

The adult Losers reunite at a Derry restaurant where Mike reveals Stan's suicide and presents evidence of new child murders.

Bill finds his old childhood bike Silver for sale in a Derry shop window and buys it for twenty dollars.

Mike Hanlon joins Bill and the others after the gravel-pit rock fight, completing the Losers' Club of seven members.

Beverly fires a silver slug from the Bullseye slingshot inside Neibolt Street, wounding It and driving it back down a pipe.

Henry Bowers escapes from Juniper Hill asylum and returns to Derry, stabbing Mike Hanlon in the thigh at the library.

The five remaining adult Losers climb down into the sewers beneath Derry to confront It for the final time.

The seven children discover It in the form of an enormous spider and Bill performs the Ritual of Chüd in the void.

Richie dives into the void to pull Bill free from It's grip, using a mocking Irish Cop impression to wound It.

Eddie sprays his aspirator into It's eye to save Bill; It bites off Eddie's arm and Eddie dies in the chamber.

Bill tears out It's heart and crushes it; Derry floods and the downtown collapses around the surviving Losers.

Pool 1 follows the central spine of the story, beginning with Pennywise killing George Denbrough in a storm drain and ending with Bill tearing out It's heart beneath a collapsing Derry. It traces how Mike Hanlon's discovery of renewed murders pulls five survivors back to a town they barely remember, reuniting them at a restaurant where their shared past slowly resurfaces. The childhood events—the first showdown at Neibolt Street, the rock fight that completes the group, Beverly's wounding of It with a silver slug—establish that the Losers can hurt their enemy when they stand together. Henry Bowers's return and attack on Mike narrows the group before the final descent, raising the cost of the confrontation. The adult battle in the sewer reveals the full horror of what the children faced, ends with Eddie's death, and closes with Derry itself physically destroyed as proof that It is finally gone.

The Losers' Club's two battles against Pennywise, from George's death to It's destruction.

Police officers investigating Adrian Mellon's murder agree to suppress all witness accounts of the clown to secure a conviction.

Henry Bowers corners Ben Hanscom on the last day of school and carves the letter H into his stomach with a knife.

Ben secretly writes Beverly Marsh a love haiku on a library postcard and drops it in a mailbox.

Ben tumbles into the Barrens while fleeing Henry Bowers and stumbles upon Bill Denbrough and Eddie Kaspbrak.

Bill rides Silver at full speed to a pharmacy to get Eddie a new asthma aspirator during a dangerous attack.

Ben directs the group in building a functioning dam that floods a stretch of the Barrens into a swimming pool.

Bill tells the group at the dam about seeing George's eyes move in the photo album and blood seep from its pages.

Blood erupts from Beverly's bathroom drain and covers the walls; her father enters but cannot see any of it.

Beverly tells the group about the blood in her bathroom and they all go to her apartment together to scrub it clean.

Mike brings his father's photo album to the clubhouse showing Pennywise appearing in Derry across several centuries of photographs.

The figures in Mike's photos begin to move and Pennywise presses his face out of the album, threatening to kill them all.

Beverly hides at the dump and watches It drag a screaming Patrick Hockstetter underground through a concrete pipe.

Henry Bowers receives a switchblade in the mail, uses it to kill his father, and is later arrested for the summer's child murders.

Beverly leads each of the boys to have sex with her in the sewer, restoring the bond that allows them to find their way out.

Bill lifts catatonic Audra onto Silver and pedals at full speed through Derry until she wakes and speaks his name.

Pool 2 covers the significant moments that give the story its emotional depth, beginning with police officers hiding evidence of the clown at trial and ending with Audra's miraculous revival on Silver. The childhood events trace how Ben, Beverly, Bill, and the others first found each other in the aftermath of bullying, asthma attacks, and terror—building real bonds while gradually piecing together the nature of their enemy. Key discoveries unfold in sequence: the photo album coming alive in George's room, Mike's historical photographs showing Pennywise across centuries, and Beverly witnessing Patrick Hockstetter dragged underground at the dump. Henry Bowers killing his father closes his childhood arc, while Beverly's decision to lead the boys to her in the sewers restores the bond needed to find their way out. The pool ends in the epilogue, where Audra waking from her catatonic state on the back of Silver confirms that It's death has undone even its most terrible damage.

The friendships, discoveries, and confrontations that forged the Losers' Club.

George Denbrough descends alone into the dark cellar to fetch paraffin wax, terrified of the monsters he imagines lurking there.

Beverly Rogan beats her abusive husband Tom with his own belt, tips a vanity onto him, and flees her apartment for Derry.

Ben Hanscom sees a shadowless clown in a mummy's face standing on the Canal ice, holding balloons that float against the wind.

Eddie tells the group at the Barrens dam that the leper he encountered under a porch on Neibolt Street wore a clown suit.

Officer Nell orders the children to dismantle their dam and warns them they must never enter the Barrens alone.

Bill and Richie look at George's photo album together and watch two figures come alive inside a century-old Canal photograph.

Stan tells the group he escaped two dead boys inside the Standpipe by shouting bird names aloud from his field guide.

Will Hanlon tells his dying story of how It used a white supremacist group to burn down the Black Spot, killing sixty people.

Beverly visits her childhood apartment building and watches landlady Mrs. Kersh transform into a witch and then Beverly's own father in a clown suit.

Mike and Richie survive the smoke-hole ceremony and share a vision of It crashing to Earth from the sky thousands of years ago.

Pharmacist Keene tells Eddie privately that his aspirator is a placebo and that his mother invented most of his illnesses.

The adult Losers' palm scars reopen at the library; they join hands in a circle and recover all their lost childhood memories.

Eddie recognizes Henry Bowers at his hotel room door and kills him by impaling him on the stem of a broken bottle.

Tom Rogan captures Audra in a hotel parking lot, then enters the sewers alone and dies of shock seeing It's true form.

The survivors' palm scars vanish as they leave Derry and they begin to forget each other and everything that happened.

Pool 3 focuses on moments of discovery, confrontation, and decision that fundamentally alter each character's understanding of themselves, their enemy, and each other. From George's terrified descent into the cellar at the very start to the survivors' gradual forgetting as they leave Derry at the end, these events map the human cost of facing It. Individual revelations—Stan's encounter with dead boys in the Standpipe, Eddie's discovery that his illness was manufactured by his mother, Mike and Richie's smoke-hole vision of It crashing to Earth millennia ago—show the Losers building courage through understanding. The story of the Black Spot fire reveals that It has been exploiting Derry's darkest impulses for far longer than the children suspected. The adult section traces the final preparations and casualties before the decisive battle: Beverly's confrontation with It at her old apartment, the recovery of lost memories in the library, and Tom Rogan's fatal encounter with It's true form in the sewers.

The revelations and turning points that define each character's path toward the final confrontation.