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?