原本仰賴魔女力量而發展文明的人類，因為超產業革命的發展，對他們來說魔女已經是不再必要的存在，甚至開始否定魔女並視為威脅，大國利迪亞更是開始獵殺魔女以消除魔法的不科學力量。少年阿德尼斯是一名年輕魔女的學徒，他眼睜睜地看著自己的養育之親兼最愛的魔女「克蘿耶」被獵殺，自己也被囚禁。痛恨這一切的他於是下定決心，要利用自己所學過的魔法報復人類……

他曾經擁有「黑人武士」的稱號，現在過著平靜的船夫生活。然而為保護一名擁有神奇力量的小女孩，他將再次捲入紛爭。

Riese: Kingdom Falling is a science fiction-fantasy series which debuted online on November 2, 2009. The series is about a traveller named Riese, who flees across the wartorn lands of Eleysia with her wolf, Fenrir. Hunted by a terrifying religious group, The Sect, Riese must evade the assassins that have been sent to kill her and discover their true objective.

In a vast and mysterious multiverse with fantastic alternative realities, a metaphysical entity has a whole plan behind it, in order to protect the timeline of an island using a book that can see the past, present and future as if it were a full script.