Lamb All Alone

Ben's school is closed due to a flood warning. At home, Ben and his family start to secure the house against the rising water. But what about the sheep in the field at the end of his garden? The farmer is stuck on his farm and can't rescue them. Together Ben's family and an RSPCA Inspector herd the animals to safety. But one little lamb has been left behind. How will they get the animal across the deep water?