Han Qiu transmigrates into the body of a low-ranking clerk in the Imperial City Office. Under a decree of the Great Yu dynasty requiring all eligible adults to marry, with violators exiled to guard the frontier, his uncle, a prison warden, arranges for him to choose a wife from the imperial prison. There, he unexpectedly saves Shen Qingzhao, the daughter of a former Vice Minister of Revenue who has been framed in a family corruption case. Using modern investigative reasoning, Han Qiu makes a name for himself in the Censorate and embarks on a path of solving cases, overturning wrongful convictions, and rising through the ranks. Along the way, he meets several extraordinary women and becomes embroiled in the twin struggles of court politics and everyday life among the common people.