Life as a sea captain's dog means protecting your owner's ship, but there is little that a dog can do against a dangerous winter storm.
When the ship hits the rocks near Maine's Great Duck Island Lighthouse, the sailors must abandon ship. As the captain's dog tries to climb into the safety of the lifeboat, one of the men panics. Fearing that the dog's weight will cause the lifeboat to capsize, the man strikes the dog with an oar. The sailors are helped to safety by the lighthouse keeper, but the dog is presumed to have drowned.
Life as a lighthouse keeper's daughter can be lonely. Young Sarah wishes for a friend. While exploring the island the day after the sailors were rescued, Sarah finds the dog washed up on the shore. Her father helps her bring the dog to the house, and Sarah nurses him back to health. She names the dog Seaboy and the two become constant companions.
When the sea captain returns to the lighthouse months later to say thank you, will he take Sarah's best friend away from her?
This pleasant picture book is based on true events. The addition of rhyming verses to the main narrative seems awkward, but this is only a small detraction from an otherwise excellent book.