I couldn't believe it. I, Geronimo Stilton, had to travel back in time to save a friend! Professor Paws von Volt needed my help. He had traveled alone to the past to prove that an object in the Egyptian Museum was genuine – and now he was lost in time!

My friends and I jumped into the professor's last time machine to find him, and we ended up on a crazy journey through history. We encountered Cleopatra, Genghis Khan, the famous poet Dante, Queen Elizabeth I, and many others. It was a fantastic trip! But will we be able to find the professor and return to the present?