Having been granted a shore leave by the Japanese Navy, Kadomatsu goes to his father's home town in Tokyo's Fukugawa district to find him and unburden himself of old family ghosts — his father and grandfather had an extremely uneasy relationship. However, he finds out to his shock that his father, as an 8-year-old in this era, was hit by a car (carrying Lt. Commander Taki) and died three days before. Stunned, Kadomatsu finally accepts that Japan of this time is not the Japan of his future and decides to hunt down Kusaka, who is actively changing the past...