Su Ruanruan, the daughter-in-law of the Shangshu Mansion, is a koi lucky star who can stop the rain with a cry and make flowers grow with her tears, but she is a cute and timid crybaby who can cry at the smallest things. In order to resolve the court's predicament, Xiao Jingyuan, the aloof prince, married her into the family with a marriage certificate. He originally wanted to treat her as a "guest in the national destiny", but he did not expect that daily life after marriage would be "crying + wiping buttocks" - she cried and looked for a cat, and found out the hidden evidence of corrupt officials; she cried and complained that the snacks were unpalatable, and hundreds of kinds of delicacies were delivered to her from the imperial kitchen overnight; she cried and she stayed up late, and solutions to the problems on his desk suddenly appeared automatically.
But Koi's good luck is never free, and every time she sheds tears, Su Ruanruan's energy is depleted, and the court's conspiracy and the jealousy of others make her framed repeatedly. When the charge of "witch" was pinned on her, the prince grounded her for the sake of the overall situation. When she exhausted her spiritual energy and lost all her good luck to save him, Xiao Jamyuan suddenly realized: what he wanted was never the prosperity of the country, but the cute little crybaby who cried for him warm tea and turned red for the smallest things...
