It's a looming horror that largely goes unaddressed and ignored by everyone except the town's children, who have no choice but to face the lurking horror haunting the backyards, rundown houses and dank cellars that make up their little metropolis.
While the titular IT -- also known as Pennywise the child-eating murder clown (played by Bill Skarsgård) -- made his unnerving debut in the film's premiere trailer earlier this year, fans are getting a better look at him here, as well as their first listen at his truly disturbing voice.
As innocent little Georgie Denbrough (Jackson Robert Scott) reaches into a storm drain during a heavy rain to retrieve his runaway paper boat, the frightening Pennywise appears from the darkness, holding his lost toy.
"Here," Pennywise says, the words dripping venomously from his bright red painted lips. "Take it…"
And that's the last anyone sees of little Georgie -- whose mysterious disappearance inspires his older brother, Bill Denbrough (Jaeden Lieberher) to bring together his group of friends and form the Losers' Club, who go on a quest to discover the truth behind the town's darkest secrets and to kill the child-murdering entity who's used Derry as its hunting ground for generations.