Alistair Grittle is a very clever boy who loves to invent things, and he has built something truly amazing for the upcoming school science competition. He has created a real, working time machine right in his own home! When Alistair climbs inside to test his brand new invention, he gets whisked away on a wild journey through history. He travels to fascinating places and meets incredible people from the distant past. He even ends up running from some very surprised historical figures. But there is one enormous problem waiting for him back home. When the science competition finally begins, Alistair cannot seem to prove to the judges that his incredible machine actually works. How can he show them where he has been without taking them on a dangerous trip through time? Get ready for a hilarious, time traveling adventure that proves science can be wildly unpredictable.