Itomura Satoshi is back again, but in Kyoto and with a new team. He begins work at the 1st Investigation Division of the Kyoto Prefectural Police Station. The 1st investigation division with deals with the most difficult cases.
Investigations on a mysterious woman Toko started when Sonoe, a teacher and Toko's fellow faculty member, was found dead as a result of what seemed to be an unfortunate accident. Eiki, an insurance investigator, and Takeshi, an ambitious police detective, find links between this case and the deaths of Toko's 3 fiances, and are determined to uncover the truth.