Camp Sapuki looks perfect with all the normal outdoor stuff: swimming, hiking, toasting marshmallows by the campfire, but when you're a Ghosters kid, normal is hard to find.

Theresa, Kerry, Joey, and Elbie arrive at Camp Sapuki excited to be in the great outdoors: trees, a lake, cabins, archery, canoeing, swimming, hiking . . . They're not so excited about seeing the sad spirit of a girl standing in the distance watching them. They discover, too late, the place is called Camp Spooky. "Great. There's like a million campgrounds in the country, and I pick the one that's haunted," Theresa says with a sigh.

Come gather around the campfire with Theresa, Kerry, Joey, and Elbie as they roast marshmallows and hatch a plan to release the ghost girl from her hidden grave. With the aid of a trickster tree spirit named Bad Jack and a mysterious Native American ghost, their quest takes them through beautiful forest and through a cave with wondrous discoveries underground lakes, waterfalls, and ancient drawings. Camping will never be the same without a few ghosts to liven things up.