The First Investigation Division of the Metropolitan Police Department, which is based in the Dai-Tokyo Police Station , is headed by Keiichiro Funakoshi, the Chief of the First Investigation Division . This is a department that specializes in considerations that lead to solutions. Along with Ryu Fujii , a new detective who was newly assigned for some reason , they lead to the solution of many difficult cases one after another while colliding with each other's strengths.
Kosuge, the president of a factory, is killed by someone while returning home. A bag charm is found at the scene. When Akira Higuchi and his colleagues from the Metropolitan Police Department's Investigation Division investigate his home, they find a bankbook with the letters A, Y, M, and S written in English. It turns out that the charms left behind were custom-made by Seiji Iwai. However, Seiji had committed suicide five years ago in a robbery-suicide case. Seiji's mother, Mizuki, is an old acquaintance of Superintendent Tendo. Higuchi heads for Mizuki's place...
Two years ago, Katsuo Todo (Takashi Naito) was appointed as the general manager of the Plato Royal Hotel Yatsugatake from the Plato Tokyo hotel. He works hard every day with his staff to provide the best time and space for our customers. Concierge Shuji Kitayama (Hishine Saku Toshihide) struggles to find a benefactor for guests Pascal Henry (Frederick Benoliel) and his wife Shizuko (Ishino Yoko). The sweets made by young pastry chef Yoshiyuki Sudo (Shunsuke Tanaka) are popular with guests, and popular writer Fuyuki Nakagami (David Ito) even stays just to enjoy them. Sudo has also decided to marry Minori Matsuoka (Rio Yamashita), and Minami Yamashita (Michiko Amekumi), who is in charge of bridal services, is busy preparing for her colleague's wedding.
