Ryūmonji Seigō (Hitoshi Ozawa), leader of the Ryūmonji Clan and known as "The Immortal Dragon," leads a double life as "Hide-san," the humble master of a small café. Despite his fearsome reputation, he upholds the yakuza code of honor, solving troubles with his own hands. When Detective Kakuta (Hiroyuki Watanabe) tells him about scams targeting the elderly, Seigō orders an investigation, uncovering that someone within his clan is involved, along with illegal drug trades. “The Ryūmonji Clan must remain noble thieves—protecting the weak.” As his dragon tattoo comes alive, the legendary yakuza takes on modern-day evils!
| Actor | Role |
|---|---|
 Hitoshi OzawaNot listed | Not listed |
 Mikio OsawaNot listed | Not listed |
 Yasukaze MotomiyaNot listed | Not listed |
 David ItoNot listed | Not listed |
 Kazuyoshi OzawaNot listed | Not listed |
 Kaname EndoNot listed | Not listed |
 Wakizaki TomohitoNot listed | Not listed |
 Takashi KitadaiNot listed | Not listed |
 Haruka KoharaNot listed | Not listed |
 Yoshiaki FujiwaraNot listed | Not listed |
 Aya KisakiNot listed | Not listed |
 Hiroyuki KonishiNot listed | Not listed |
 Hiroyuki WatanabeNot listed | Not listed |
 Jiro OkazakiNot listed | Not listed |
 Ryo TamuraNot listed | Not listed |