Thelma Bee is back and ready to celebrate the spookiest season of all...except this Halloween isn't short on tricks.

When The Haunted Dungeon, a notorious Halloween attraction, reports an actual ghost stirring up trouble beyond the splattered walls and latex masks, Thelma and the Riverfish Valley Paranormal Society are on the case. But once she investigates, Thelma quickly learns this isn't a normal haunting. A terrifying local legend is lurching to life underground, and it's connected to a darkness that's trying to twine its way around her heart.

In this action-packed finale, Thelma must find the truth and battle alongside her friends to protect all of Riverfish from a rising evil, and save her own soul.

And also, there's a dance. Seventh grade is complicated.