Seven helpless and bullied children are forced to face their worst nightmares when Pennywise, a shape-shifting clown, reappears. The clown, an ancient evil torments children before feeding on them.

After 27 years, the Losers Club receive a call from their friend Mike Hanlon that Pennywise is back. They decide to honour their promise and return to their old town to end the evil clown for good.