铃木阳子是（尾野真千子饰）出生于极其普通家庭的普通女人，正因为她的平凡，才会被拿来与天才弟弟做比较。弟弟被母亲溺爱，而自己不被重视，平凡地当一个OL，一边怀抱着寂寞一边在普通的家庭中平淡的生活着。但是以欠债的父亲失踪为契机，阳子的人生陷入了黑暗，不幸的事情日积月累，她因为生活痛苦而成为了风俗小姐。为了生存下去，阳子染指了保险金杀人，在重罪之下最后孤独的死去

一名年近40歲的女子，某日被發現陳屍於東京一處獨居公寓中。其遺體幾乎已被屋內的11隻貓啃食殆盡。警方發現屋內金魚缸裡一本存摺上的名字為「鈴木陽子」。此樁看似單純孤獨死的死亡事件，背後究竟會牽扯出多少駭人聽聞又黑暗的事件呢？

A woman’s dead body is found in an apartment in Kokubunji, Tokyo. The decayed body seems like a half year has passed since its death and it is damaged by domestic cats that ate the body. The woman's death is thought to be a "lonely death" (someone died naturally without anyone noticing for a long period of time). Detective Ayano has doubts about that conclusion. The cats seemed like they were not house trained, which is odd for domestic cats. Detective Ayano wonders whether the cats were really owned by the dead woman. Detective Ayano then finds Suzuki Yoko’s bankbook in an empty fishbowl. It seems like the dead woman is 36-year-old Yoko.