The Mercenaries of Ice and Shadow have but one goal: aid those facing peril, no matter the cost.
Years after the Assassin Guild War, the Mercenaries, led by Casey and Noriko, continue to focus on helping those possessing the power of darkness. Though the power is no longer as rare as it once was, those possessing it are no less persecuted and discriminated against. Attacks, disappearances, and even murders have become part of normal life for people with dark power. The Mercenaries stand as their one unfailing ally.
When the Mercenaries find themselves targeted by the most obstinate anti-darkness organization, Casey and Noriko must journey to uncover the truth behind the persecution. Through unlikely allies and twisted battles, the duo discover how deep the pain of those possessing darkness runs. Will Casey and Noriko be able to find the source of the persecution in time? Or will the power of darkness die out with all those who possess it?