Who is Geronimo Stiltonoot? He is a cavemouse-Geronimo Stilton's ancient ancestor. He runs the stone newspaper in the prehistoric village of Old Mouse City. From dealing with dinosaurs to dodging meteorites, his life in the Stone Age is full of adventure! Old Mouse City is in uproar. The most precious artifact in the mouseum, the Stone of Fire, has been stolen! Geronimo Stiltonoot and his cavemouse friend, Hercule Poirat, are on the case. It's up to them to retrieve the stone from the ferocious Tiger Kahn and his band of fearsome felines!