In the thirteenth year of the Wanli reign, modern forensic doctor Su Jin transmigrates as a failed scholar in Yingtian Prefecture. Disguised as a man, she solves cases with criminal investigation techniques, but is condemned for using “demonic arts” when she examines corpses to uncover crimes. She and the cold, ruthless Embroidered Uniform Guard Lu Heng go from mistrusting each other to joining forces, exposing the corruption behind the grain transport system and a prince’s treasonous plot. Amid court intrigue and a crisis over her identity, they take one step at a time between uncovering the truth and falling in love.