In their magic treehouse, Jack and Annie are again transported to King Arthur's realm, where invisible beings, giant ravens, and mistaken magic spells have a duke's castle in an uproar on Halloween night.

"It started out to be a simple visit to a sick old aunt, but strange things were happening at the rundown house. Could it be haunted?" Spooky things are happening in Aunt Matilda's house. Potato chips on the floor are spelling out secret messages and forming trails. And if Aunt Matilda is snoring in her bed, then who is whistling a tune? There must be a ghost in Aunt Matilda's house.

Discovering her ability to see ghosts when a cruel act ends her father's life and forces her to move in with relatives in 1920s Pittsburgh, young Ophelia forges a helpful bond with a spirit whose own life ended suddenly and unjustly.

Disregarding warnings about the creepy mansion outside of town, Annie bravely goes to investigate on Halloween night and gets a big surprise.

When best friends Lena and Abby find an old Polaroid camera at a thrift shop, they're creeped out by the images it produces, which include the shadowy figure of a boy they've never seen before.

Amateur detectives Milo and Jazz try to figure out if the haunted house they are building for the school fair has a real ghost.

As Halloween nears, Captain Awesome and Nacho Cheese Man set out to protect Sunnyview from monsters but when they encounter what may be a real haunted house, they suddenly remember they have homework to do.

When a house believes she is haunted, she tries everything in her power to stop it in order to get people to move in--until she realizes that she is fine just the way she is.

Told in their separate voices, Gavin, a loner outcast, and Delilah, back in small-town Kansas after years at a Massachusetts boarding school, reconnect their senior year, but as their relationship deepens, it is clear that the eerie house Gavin dwells in will do anything to keep the two apart.

Bradley, Brian, Nate, and Lucy visit a haunted hotel on Halloween, but once inside they realize that they have seen plenty of people going in and none coming back out.