When best friends Finny the Nestrian and Leah the Grymp are finally reunited with their parents on board the ark, they quickly realise that there is no sign of the high waters retreating just yet. Life at sea is not easy, food is bland and stocks are running low. An uneasy, fragile peace between carnivores and herbivores, could break down at any second. Leah convinces a reluctant Finny to agree to a midnight raid of the food stores, which inadvertently leads to them being washed overboard -again!- along with the last of the food supplies. What is to become of Finny, Leah and the rest of the animal kingdom?