On Halloween Eve, siblings Bill and Leah encounter Shade, an invisible ghost from the Invisible Universe who can only be seen by them. Shade longs to join the village's Halloween celebration, but as an invisible spirit, it has always been left out.

With its magical powers, Shade pulls pranks, creates spooky effects, and helps Bill and Leah enjoy Halloween in a way no one else can. But as the night unfolds, the villagers begin to notice strange occurrences, while the kids and Shade have the adventure of a lifetime. A tale of friendship, magic, and Halloween fun!