Maomao follows her mother Xia Xiaoxiang to marry into the Lou Marshal Mansion as the fourth concubine. Everyone thinks she is an unloved baggage who will be tormented by the wealthy family. But Maomao is born with a koi lucky star constitution, able to foresee good and bad luck, turn misfortune into blessings, and her little hands carry thriving luck. Her aloof and disabled fourth older brother is healed and revitalized by her, her overbearing third older brother gets super rich thanks to her luck, her solemn eldest brother protects her in everything, and her gentle second older brother is dedicated to caring for her body; the cold-faced old madam and various concubines in the mansion all compete to hold her. The entire marshal mansion pampers the little milk bun into a unique treasure.