Anuki is a boy caught in a war between two countries. When he is small he is abandoned by his father so a princess could be saved. This event triggered amnesia so he doesn't remember his childhood before this event. When he grows up he joins a flight mercenary unit to be trained as a pilot so he can help in the war, there he becomes the ace pilot.

After more than 200 years, the kingdom Chronos is declining. Ten years of peace undermined the army and in the country, formerly called the "Land of the Sword", is left with nothing but old heroes. In the south and east, two major kingdoms threaten Chronos. Silonika Isiris in the west is, too, gaining momentum with the smaller states, united under the Radinka Alliance. In addition, King Chronos apparently begins to lose his mind... In these challenging times Chronos's only hope lies in their mercenaries, among whom just came a new addition: the young, but incredibly skilled warrior Ares and his friends, Michael and Baron.