Akatsuka Detective Agency stands inconspicuously at Shimo-Akatsuka in Tokyo’s Itabashi ward. Its carefree, eccentric investigator Nanase Goro (Eita) is eager to take on troublesome cases that everyone else is reluctant to. At times, he and his partner Kogure Kyusaku (Morita Go) tackle sad cases and sometimes difficult ones that are beyond imagination. The detective agency is headed by Kaze Kaoru (Yamaguchi Tomoko), a heavy drinker who downs alcohol during the day but watches out for Goro and Gure.