In Kanata's world, all citizens must wear "vision orbs" that allow them to be condemned by popular vote if they commit a crime. Kanata is the only son of a respected village leader who runs an orphanage, and has begun to harbor feelings for Misella, a girl in his care. One fateful night, tragedy befalls Misella, and Kanata commits a grave crime in order to save her. In her zeal to protect Kanata from the consequences, Misella ends up with blood on her own hands. Caught in the act by their vision orbs, both are judged to be "transgressors" by their fellow citizens, and "enforcers" are dispatched to punish them. As they flee for their lives, they meet the notorious Vicious, a man known worldwide as "The Great Transgressor." He offers them a choice: "Own your sin or let it own you." Kanata and Misella decide to face up to what they've done, and fight for their lives while bearing the weight of their crimes. Now able to tap into the power of their "blood sins," the two accompany Vicious on a quest to find respite from a world that wants them erased.
