Frank Gallows has some explaining to do. The burned-out ghost wrangler has just sent an innocent child into the world of the dead. The kid's name is Garth Hale. In the regular world, he's just your average boy...who also happens to have a terminal illness. But Garth discovers that he has some quite extraordinary powers in Ghostopolis.
No living souls have ever made it back to the regular world, so Mr. Gallows is losing his job for this big-time screw up. The fact that Garth didn't have much time to live in the first place makes the situation even worse. Gallows has to hang up hunting those ghosts who wish to remain in the land of the living. He'll never have the pleasure of capturing repeater offender Benedict Arnold. No, Gallows has to right this wrong. Luckily, his ex-fiancée Claire Voyant has a machine that can take you back and forth between the worlds. Frank is going to have to play nice.