In Tokyo, Japan, several grotesque murders take place on rainy days. Detective Sawamura, who is in charge of the case, soon discovers that his own family is connected to the crimes.
| Actor | Role |
|---|---|
 Shun OguriHisashi Sawamura | Hisashi Sawamura |
 Machiko OnoHaruka Sawamura | Haruka Sawamura |
 Shuhei NomuraJunichi Nishino | Junichi Nishino |
 Tomomi MaruyamaTsuyoshi Sugawara | Tsuyoshi Sugawara |
 Tomoko TabataKayo Akiyama | Kayo Akiyama |
 Mikako IchikawaMikie Tachibana | Mikie Tachibana |
 Masatô IbuToshio Okabe | Toshio Okabe |
 Nao OmoriHisashi’s Father | Hisashi’s Father |
 Yutaka MatsushigeKozo Sekihata | Kozo Sekihata |
 Satoshi TsumabukiThe Frog Man | The Frog Man |
| HHimiko IgarashiShota Sawamura | Shota Sawamura |
 Michiko IwahashiNot listed | Not listed |
 Yu TakahashiYuki Imamori | Yuki Imamori |