The Si family, a prominent family in Beiyang, adopted Juan Juan, an orphan. With her own "communication among all things" and wonderful blessings, she used her innocent and lovely children's words to help her brother get out of the slump, warmed her sick second uncle, and melted her adoptive father who had a cold personality, becoming the apple of the family's eye. Facing the turmoil in the business world and the twists and turns in life, Naituanzi, possessed by the koi, can always resolve the troubles with innocence. In the end, under the influence of her good fortune, the Si family prospered and benefited everyone. With this love and protection, Juanjuan happily became the most favored little lucky star in Beiyang City.