Geronimo Stilton travels back in time to the ice age, ancient Greece, and Renaissance Italy, where he experiences wild historical adventures. Geronimo Stilton travels back in time to the ice age, ancient Greece, and Renaissance Italy. He encounters woolly mammoths, writes and stars in a play, and even helps put a bad guy in prison! But when the portal started malfunctioning, will Stilton and his family be able to get back to the present day, or would they get lost in time?