Dave, an alien on Glix, wakes up and tries to live a normal life. When he makes the foolish mistake of believing himself sane, he discovers his jam sandwich is talking to him. As one would expect of any worthwhile lunch, the sandwich leads him towards a mysterious oak tree - allegedly the centre of the country's knowledge. However, Dave is not the only person heading there. His friends the Space Chicken and Fred Jr are also making their way to the Great Oak Tree. And Clint and Clein - the intelligent twins - happen to be sowing a rather strange acorn. It seems the journey might not be as straightforward as finding a tree after all. This novel is a sequel to 'The Fez'.