When the convalescing Chief Father Christmas is made to keep warm and take Dr Repairall's Nourishing Tonic (2 spoonfuls 3 times a day and NO SPITTING ), Grumbo, Percy, Jack and Tingle set to work to rescue him. They decide he needs an adventure, and that of course, is what they all get, plus terrifying volcanic eruptions, lava flows, dark caves, etc Meet the sinister Augustus Sourswiggle, Fifi, the spare giraffe and Jeremiah, the lonely archivist and travel from one side of the earth to the other by an unusually direct route. This is the second fast moving lively adventure story in the Percy and Grumbo series following 'The Wrong Night'.