“Nemesis Detective Agency”. The three members of this agency, located on the second floor of a run-down Yokohama building, are the talented assistant who leads them to the case’s solution in an instant, Mikami Anna (Hirose Suzu); the seemingly capable man who is, in reality, a fairly unreliable detective, Kazama Naoki (Sakurai Sho); and Nemesis’ company president and veteran detective with other 30 years’ experience, Kurita Kazuaki (Eguchi Yosuke). This company Nemesis’ first job is pictured in the series’ first episode. The first client for them to celebrate is the pretty doctor, Uehara Kiiko (Oshima Yuko). With her only reason for choosing them being “when I googled they were the first result,” the request Kiiko brings to Nemesis is as follows: the billionaire, and her own employer, “play boy of Isogo” Shibusawa Hokiichi (Ibu Masato)’s 80th birthday party is taking place that night. However, they were sent intimidating blackmail that says "if you don't cancel the party, his life will be in danger"! And it seems he wrote in his will that he is splitting his vast inheritance between his six lovers… as expected of a play boy! The Nemesis team accept their first request, and eagerly make their way to Hokiichi’s stately mansion. Kurita turns a sour face towards the well-liked Hokiichi, with his collection of six pretty girlfriends. However, Hokiichi’s corpse is discovered within his “bedroom that became a locked room” the day after the party! The suspects are the seven pretty women who lack an alibi, client Kiiko included. And every person has the incentive to kill him… Can the genius detective Anna and the unreliable detective Kazama, taking this on as their very first investigation, solve this difficult case!? Also shown is the intriguing “flashback to 20 years ago” and “Anna’s Father (Nakamura Toru)’s figure.” Every case will, eventually, lead to one truth.