Geronimo Stilton's ancient ancestor, Geronimo Stiltonoot, is back in another prehistoric adventure!

A visiting rodent explorer arrives in Old Mouse City with astounding news: on his recent journey to a cold, distant land, he spotted a mountain… moving! Holey cheese! Could it be possible?

Determined to uncover the truth, Geronimo Stiltonoot sets off on a thrilling journey to the land of ice and snow. What mysterious secret lies behind the moving mountain? Get ready for a fur-raising expedition full of discovery, danger, and prehistoric fun!