Single mother Su Wanqing struggles to make a living with her sensible son Tuantuan. Accidentally, she rescues Gu Shensi, a business chairman suffering a sudden myocardial infarction on the street, but is misunderstood as an attacker by Gu Shensi's son, Gu Mingxuan. Kind and resilient, Su Wanqing expects no reward and stays true to her heart despite life's hardships. Smart and well-behaved, Tuantuan turns into a little divine assistant, constantly narrowing the distance between the mother-son duo and the Gu family. As layers of conspiracies are uncovered and the mystery of their background comes to light, Su Wanqing stands firm with her own talent, ultimately reaping a sincere romance and welcoming a happy, fulfilled ending for the whole family.