One day, Rika Nishina (Negumi Okina), a volunteer at the social welfare centre, is asked by one of her colleagues to go to the Tokunaga residence to care for Sachie (Chikako Isomura). He tells her he would normally send Takahashi, but he cannot be contacted.
Rika enters the house - the door is strangely unlocked, and finds Sachie in the Japanese room. While cleaning the house, Rika finds a crumpled family photograph with the mother cut out. While there is no trace of Katsuya (Kanji Tsuda), Sachie’s son, or his wife Kazumi (Shuri Matsuda), Rika does discover a child called Toshio (Yuya Ozeki) locked up upstairs in a closet.
