Walter longs to be a sea dog. He comes from a long line of seafaring dogs, all of whom made their livelihoods from the sea, but, alas, Walter's talent seems to extend only to baking. He sells his breads and cakes, made from his aunt's classic sea dog recipes, in the village tea shop. But, when an unfortunate incident plunges Walter into a deep-sea adventure, he is brought face to face with the legendary Big Boris and discovers his place as a true sea dog.