There’s a ghost in Tom’s cellar! But slimy Hugo is an “ASG” — an Averagely Spooky Ghost — and Tom soon realises that Hugo is not only harmless but also desperately in need of help. Hugo cannot go back to his haunted house because a dangerous Ancient Ice Ghost has moved in and is spreading an arctic cold over the entire town in the middle of summer. Only with friendship, courage and self-confidence — and the assistance of ghosthunter Hetty Cuminseed — can they overcome their adversary and save the town.