You work as a freelance exorcist for a living and you live alone. You possessed a unique power from your bloodline which is of your essence in your body where you can use it to exorcise or purify corrupted Yokai that's reside in the human body or outside the world. Only you can see Yokai. You only use your essence to exorcist and purify corrupted Yokai but many Yokai eager to meet you in ill intention for your unique essence because your essence can make them stronger if they consume.