During the Edo Period, hundreds of ghosts appeared at night. The prosperous era was created by co-existence of monsters and humans. However, as time goes by, monsters could only be heard in stories. leila starts believing the existence of monsters since the childhood under influences of her grandma. After her grandma’s death, she guards the shrine alone and acts as the priestess. At a summer sacrifice, a strange handsome boy comes to the shrine to “pray”. leila doubts about his identity. The surprised boy turns to the monster form in front of her. It is the first time for leila to meet a real monster called Master Carter.