Machida Mai (Yamashita Ryo) is a kindergarten childcare worker. One day, a mother (Sakura Ichika) sent her young son to the kindergarten with an embarrassed expression.The child's older brother, Taniyama (Ryota Inoue), a middle school student, vandalized a street monument with a baseball bat, an act of wanton violence that was filmed and widely shared online.In order to avoid letting the child hear other parents discussing the matter, Mai took him away.At this time, Aoki (Masaki Okada) passed by pushing Tachibana (Itao Hōji) in a wheelchair. They looked a little strange. Although Aoki claimed to be a volunteer, the relationship seemed to be more than that.

On the way to send Tachibana home, three staff members who had been regularly cleaning Tachibana's house for the past two years appeared in turn.After they tidy up the Buddhist altar, they always put their hands together in front of the portrait of Tachibana’s daughter Misato.Ten years ago, Misato was bullied when she was still a middle school student and finally chose to jump off a nearby bridge and end her life.While the cleaning work is in progress, Yuu (Emoto Tokio) notices that the couple are acting more cheerful than usual.

Aoki returned to his studio, where the investigation materials related to Mai and Misato were scattered on the table, including photos of Taniyama's face who was labeled as a “saboteur”.The darkness behind Misato's death and the destruction of the monument seems about to be revealed in the light of day.