Fifteen-year-old Samuel plunges to his death while building his beloved Titanic. Now as the greatest ship the world has ever seen crosses the Atlantic Ocean, Samuel finds himself on board ? as a ghost. His spirit roams the ship, from the glamour of first class to the party atmosphere of third class. Sam shares the excitement of Jim, Isobel and their children - on their way to a new life in America. Disaster strikes when Titanic hits an iceberg. As Titanic sinks to her icy grave, Jim and his family are trapped behind locked gates ? Can Samuel's spirit reach out to save them?