An afterlife therapist and his daughter move into a crumbling mansion to rid it of wicked spirits. They meet a friendly young ghost named Casper and his three obnoxious uncles. Together, they must deal with the ghosts and help Casper resolve his unfinished business from his human life. As they bond and uncover secrets about the mansion, they also encounter a treasure hunt and a machine that can bring the dead back to life. In the end, Casper sacrifices his chance to become human again to save his new friend's father.

Casper, a friendly ghost, forms a bond with a young boy and together they must find a way to save their school from the clutches of a bully. Along the way, they navigate through haunted houses, slime, and even a mansion. This heartwarming story explores themes of friendship, family, and standing up against bullies.

Casper, the friendly ghost, meets Wendy, a good little witch. They become friends and go on an adventure together to save Wendy from the evil warlock.