When Zhang Guilan is hospitalized due to a sudden cerebral infarction and her three siblings return home to pool money for medical expenses, they discover that their mother's 300,000-yuan retirement savings have vanished, sparking mutual suspicion and conflicts among the siblings and sisters-in-law. As the mother's close friend brings out a sealed diary and keepsake, the mystery surrounding the three children's birth is gradually unraveled. In the end, the family resolves their misunderstandings, tracks down Zhao Kai who set up the money scam, and recaptures family affection and warmth.