Xiao Chengyuan, the heirless Emperor of Great Liang, recruits women from across the land into his palace. When Su Luoshuang enters the palace to give birth, she unexpectedly delivers five adorable five-tailed koi fry capable of transforming into human beings. To avoid disaster, she is banished to a remote palace, where she accidentally discovers that the emperor's true form is a dragon carp. Noble Consort Xuan conspires with powerful maternal relatives to harm the children and seize the throne. Su Luoshuang and Xiao Chengyuan join forces to fight the conspiracy, protect their five adorable koi babies, crush the rebellion, and find a love that is reciprocated.