Tobias is a very special mole. He collects shiny round pebbles and hides them down in his burrow where they're safe . . . or are they? When a "friend" warns him about robbers on the prowl, Tobias begins to worry. Should he scatter the precious pebbles throughout his network of tunnels? Or can he guard them more easily together in one room? Frantically, Tobias moves his stones from one place to another until he discovers, too late, that he has been...