An Elder Bairn attacks the shrine and kills one of Saya's friends. School is canceled out of fear for the students' safety. So why is Nono wandering the streets? And why does her shadow seem to have a life of its own?

Saya returns to the shrine to find her father unconscious on the floor, leading her to wonder if he might be keeping something from her. When an Elder Bairn attacks the school, she must choose between keeping her secret and saving her classmates.