In the winter of their final junior-high year, Minato, Mio, and Ritsuki find a small girl crouching in the snow and take her to a police box. A year after receiving a commendation, a news report about child abuse makes them question whether they had listened to the girl's wishes, and they begin searching for her. The novel explores choices shaped by goodwill and ideas of what is right.

Was protecting the girl that night really the right thing to do?