Based on the comic by Ayumi Tachihara
Nami, the young madam of a well-established hot spring hotel in Kotohira, is reunited with her childhood friend Kana who has come to participate in an art auction. However, when people with links to the auction start getting killed one after another, Nami sets out to find the criminal with her detective husband Ryohei.
A big battle between world class phantom thieves unfolds over the worlds largest diamond!
