An all-night read-a-thon at the Sleepy Hollow Elementary School turns into a treasure hunt when the kids read about hidden treasure in the school basement.
When Allie is contacted by the ghost of a dog, she and Dub investigate the surly new boy at school and his father, who may be running a puppy mill, to see if they are involved.
During a summer in an abandoned mining town, Katie's relationship with a rebellious stepbrother improves as they probe the past to find out why there seem to be ghosts, literally, beneath their feet.
Molly and Michael dislike their spooky new stepsister Heather but realize that they must try to save her when she seems ready to follow a ghost child to her doom.
After Ashley and Kristi find an antique doll buried in old Miss Cooper's garden, they discover that they can enter a ghostly turn-of-the-century world by going through a hole in the hedge.
When a stranger comes to town and threatens to turn the old Parnell mansion into an amusement park, three spunky youngsters join forces with a trio of ghosts to outwit the plan.
