The story of a family and town's effort to save a beloved and heroic dog named Semper Fi. Their lives tumble along, as most families do, until they must face the grave diagnosis of their golden retriever, Semper Fi. The family cannot afford the expensive surgery the dog needs. The children jump into action with a plan, spear headed by the fifteen-year-old daughter. They plan a community yard sale, donating all of their most-prized possessions. Before Semper Fi goes in for his surgery, he displays a heroic act that almost ends his life.