Under three commandments, "Keep your true identity hidden," "Do not let demonic energy taint you," and "Do not shed innocent blood," Source Ability users maintain peace between the Source World and the ordinary world. Ye Lan, a Pureblood boy chosen by the Source World's highest academy, gives up the promising future others envision for him. To honor a promise made long ago, he chooses a mad and dangerous path: joining the special organization No Faith, made up of Half-Bloods who carry demonic blood. This seemingly wayward path leads to the truth hidden behind several worlds.
