The tale takes vicinity over a 24 hour period. In the southernmost a part of Japan, 20 fishing boats of an unknown nationality abruptly fireplace upon and occupy parts of the Hateruma archipelago. Members of the Japan Coast Guard are detained. Under the extremely irritating scenario, the Japanese government sends Aircraft Carrier Ibuki and an escort fleet to the region. Ryota Akitsu (Hidetoshi Nishijima) is the captain of the Aircraft Carrier Ibuki and Toshiya Niinami (Kuranosuke Sasaki) is 2nd-in-command. It is now 6:23 am. And Japan faces one day which they by no means have before.