The era is A. C. 2050, Half a century in the future. It is neither too long nor too short from now. Tensions between countries, coupled with the astonishing development of high technology, the Asian market has gradually become a target for other countries to covet... In the face of overt and covert conflicts of interests, a group of "mercenaries" who have undergone organizational transformation are quietly coming to the source of the turmoil, waiting for an opportunity...