The games of the thirtieth Trolympiad are being held in Slag Valley and Lord Coal himself will preside over the opening ceremony, lighting the Great Torch and firing off the greatest sporting event in the troll calendar. But tickets are hard to come by, so when Herbert wins some in a bet, he and the family are off to Slag Valley like a shot. Only sport isn't the only thing on the agenda.Join Herbert and Maude and their lad Horace as they experience the thrill of such sports as goblin putting, elf wrangling, dwarf lobbing and goat scaring in the Trolympic Arena, having the time of their life, until they discover the security ogres and the human terrorist threat.Then the game is really on.