The newest, most advanced destroyer in the Japan Maritime Self-Defense Force, the JDS "Mirai", sets sail from Japan on a training exercise with the United States Navy. En route, they encounter a strange meteorological anomaly, causing the "Mirai" to lose contact with her sister ships. After a short time, the crew detects a fleet approaching, but can barely believe their eyes as a massive battleship passes by them. The crew soon identify it as the "Yamato", a ship which was sunk in 1945. As the crew scans with their radar, numerous other ships, including a "Nagato"-class battleship, are sighted. Two destroyers from the unknown fleet attempt to intercept the "Mirai", but she manages to escape.