The Tanaka family's legacy as private investigators hangs by a thread after the passing of their career private eye father. Eldest daughter Sayuri, now the family's pillar, plans to shut down the struggling detective business, seeing no interest from her younger siblings to carry it on. Just as she prepares to close this chapter, her long-lost elder brother, Ichiro, returns. A down-on-his-luck truck driver and single father, Ichiro unexpectedly steps up to lead the family enterprise, despite his only relevant experience being childhood games. He moves back into the family home as the new president, prompting a crucial question: can the Tanaka clan unite to revive their father's business, or does Ichiro, with his sudden reappearance and ambition, have ulterior motives for the family's future?
Other names: 探偵家族, Tanaka Clan Detectives, Detective Family