Shen Zhiyu, the daughter of the guilty minister, who had been lying dormant for eight years in the imperial hospital, accidentally broke into the emperor's heart because of bleeding a koi carp. She pretends to be stupid and hides her clumsiness, and she uses silver needles to cure her head ailments and even her lonely heart; he is a cold-blooded emperor with the ultimate double standards, and he transforms into a wife-loving maniac for her. When the arrogant medical girl meets the emperor with a headache, the sweet-scented osmanthus sugar sweetens the palace, and the koi carp swims into the heart. Sweet love, two-way healing, a salty fish's counterattack, two lonely souls embracing each other - "I also want to be a salty fish, with you."