Ghosts are afraid of people, and people are afraid of ghosts. One day, a girl named Maribel meets a timid little ghost named Pluft, who lives on a deserted island inside a castle that hides a treasure.

Ghosts are afraid of people, and people are afraid of ghosts. One day, a girl named Maribel meets a timid little ghost named Pluft, who lives on a deserted island inside a castle that hides a treasure. However, they are separated when Maribel is kidnapped by the pirate Peg-Leg, who covets the hidden riches; they will need to overcome their fear of one another.

Maribel is kidnapped by the pirate Peg-Leg, who is after hidden riches. To defeat the pirate, Pluft and Maribel will need to overcome their fear of each other.