Angleterre, XIXe siècle. Ruwanda est un jeune garçon né dans un monde déchiré entre l'ordre et le chaos, la richesse et la misère. Libéré de l'emprise de sa mère, il sort des ténèbres, les mains couvertes du sang de nombreux innocents. Quel avenir la vie réserve-t-elle à un orphelin qui ne connaît que la mort et la souffrance ? Qui ne connaît que la solitude et la noirceur ?

A young boy raised in a cellar enters the light. As the lonely child journeys to find companions who share his tastes, he suddenly finds himself a member of the Organization—a mysterious assassins’ guild led by an enigmatic nobleman named Midwinter. Are his new associates those Ruwanda seeks? Or will the red fog descend once more, leaving a trail of bloody corpses in its wake...?

Ivan, Ruwanda’s partner, has a tragic past. Betrayed by his father, he seeks the love he lost in a ruthless band of assassins. Meanwhile, Ruwanda, just can't get along with Mei, a being overflowing with an abundance of love. Plotting Mei’s murder, but wavering because of love, will Ruwanda and Ivan be overcome by the red fog...or will love triumph in the end?

A young boy who came from the darkness now lives in the light. Although he has found companions of a sort, his truest desire―to search for his mother―will lead the lonesome boy elsewhere. Doubting the assassins guild he found himself a part of, Ruwanda enlists Ivan in his quest. But as the two uncover deadly secrets about the Organization, the red fog follows close behind...

命懸けの「愛」を知ったルワンダに最強の敵が牙をむく!! 自らの命と引き換えに、我が子であるルワンダを守ったミランダ。ルワンダは、初めて知った真実の愛と、母を失くした衝撃で空虚となり日々を過ごす。やがて、ロンドンで連続殺人が起き、それを知ったルワンダは、ある目的でロンドンへと向かうのだが…。少年・ルワンダが青年に成長し、最強の敵と繰り広げる死闘を圧倒的迫力で魅せる、堂々の最終巻!!