Hatter Madigan Ghost in the Hatbox

During his first adventure, Hatter Madigan makes friends with a group of new cadets and find themselves almost immediately launched on their first adventure; when Hatter and other cadets have ghost sightings. They soon learn that these "ghosts" are connected to the academy's H.A.T.B.O.X (Holographic and Transmutative Base of Xtremecombat). And that they have the ability to possess the bodies of the living.