When the Cavemice discover a giant oyster in the lagoon near Old Mouse City they call on Geronimo Stilton to help them fish it out of the water before the saber-toothed tigers find the pearl.
When the Cavemice discover a giant oyster in the lagoon near Old Mouse City they call on Geronimo Stilton to help them fish it out of the water before the saber-toothed tigers find the pearl.
