Shadrach is a very old, circus-trained Clydesdale horse - and the favourite family pet. When Hannah discovers that Shadrach has been sold to a dog food factory, she decides to mount a heroic rescue and enlist the help of her two younger brothers. From the beginning, their plans go seriously wrong. By the time they've argued with the repulsive Wuff Stuff man, hidden Shadrach in a church and in a caravan, and floated him on a mussel barge, they're in desperate need of rescuing themselves.