Detective Otonashi Tsukiko (Nagasawa Masami) works for the First Investigation Division team led by Tannai Ichio (Takenaka Naoto). She is also obsessed with the "Toshi Densetsu" manga. Detective Otonashi Tsukiko even claims she became a detective because of "Toshi Densetsu." Whenever a case happens, Tsukiko Otonashi contemplates whether it may have any relations to "Toshi Densetsu". Meanwhile, forensic investigator Katsuura Hiroto (Mizobata Junpei) falls in love with Detective Otonashi Tsukiko on first sight.