Marcus the Mole isn't very good at being a mole. He spends all day digging and tunneling but never finds anything, unlike other moles who are busy unearthing valuable treasures! Then one day, he finds a small potato, which he cares for and nurtures from then on. Although it's not as valuable as the other treasures, Marcus still dearly cherishes his potato. But all good things must come to end.Will Marcus be able to cope?