For Emilia Miani, a fifteen year old girl from San Diego, CA the supernatural world and its creatures only existed in books and movies. But when she visited her father in Japan and met Shin Kurosaki, a Japanese demon assigned to be her guardian angel by one of her ancestors 500 years ago to protect her from her destiny, supernatural events begin happening to Emilia and they continue escalating.
During her journey, Emilia discovers her family secrets. Her grandfather was a death angel hired by God and she is and
forced to step into his shoes by God and Lucifer to stop Markus, an ex-death angel set on destroying them to become a new god.
She also discovers that she has a special blood - a divine blood - running through her veins. A blood that kills anything it comes into contact with, including her.