Sugimoto Ryuji (Tamura) moves from Tokyo to Kanazawa as his new novel is being serialised in a local newspaper published in Ishikawa Prefecture. Although his novel is enjoying a lot of popularity, Sugimoto's suspicion is aroused when Shiota Yoshiko (Hirosue), a mamasan working at a nightclub writes a letter to the newspaper publisher and asks to subscribe to the newspaper for the sake of reading the novel. However, in just a few days, Yoshiko sends another letter asking to terminate her subscription and complains that the novel is boring. While scouring the newspaper with his assistant Tasaka Fujiko (Mizukawa) on that day to find the reason for Yoshiko's change in attitude, Sugimoto becomes convinced that Yoshiko was actually not interested in his novel but just wanted to reach about the double suicide case involving a couple and decides to pay a visit to Yoshiko in Tokyo.
The filming of the drama SP started in the beginning of this month at Wajima on the Noto Peninsula in Ishikawa Prefecture.