Three-and-a-half-year-old cute baby Fubao is left on the streets and adopted by four sworn brothers struggling at the bottom of society. Her innate koi good luck and high emotional intelligence quietly heal this patchwork family. A piece of blood jade attracts the Xiao family of the capital to acknowledge their kin, bringing successive waves of true young master identity, barriers between true and false young masters, past traumas, and public opinion storms. Can the four down-and-out fathers counter-attack their lives? Can Fubao protect the hard-won family? Behind the turning point of fate, an even deeper secret seems to be hidden.