In the 1970s, aimless teenager Greg Laurie searches for all the right things in all the wrong places until he meets Lonnie Frisbee, a charismatic hippie/street preacher. Together with local pastor Chuck Smith, they open the doors of a languishing church to an unexpected revival.

After their dad's murder, three siblings move with their mom to his ancestral estate, where they discover magical keys that unlock powers — and secrets.

In the summer of 1989, a group of bullied kids band together to destroy a shape-shifting monster, which disguises itself as a clown and preys on the children of Derry, their small Maine town.