It tells the story of a pair of mortal enemies who accidentally became a couple but fell in love with each other in a series of bizarre cases and finally chose to fight side by side.

Jiang Si, the fourth lady of Dongping Bo Mansion, is reborn after dying at the hands of her lover, Yu Jin. Determined to rewrite her fate, she breaks off her engagement, outsmarts her cruel aunt, opens a perfumery, and investigates a series of mysterious crimes. She reunites with Yu Jin, and despite their unresolved past, they join forces to change tragic destinies—saving her siblings and clearing her father’s name. As they overcome hardships together, Jiang Si’s feelings for Yu Jin rekindle, and they work hand in hand to protect the peace of the Zhou dynasty, embracing a lifetime of prosperity.

Detective Sun's pursuit of murders linked to his father's shooting uncovers partner Chu's secrets and Chief Gao's trap to reveal long-buried truths.