The husband is away for a long time on business, leaving his wife and her daughter-in-law to live together. The daughter-in-law is gentle and virtuous, but she gradually shows complex emotions and personalities in daily interactions. On the one hand, she did her best to take care of her mother-in-law, and on the other hand, she developed a deep emotional attachment to her husband. The mother-in-law was wary of her daughter-in-law at first, but over time, a deep mother-daughter friendship was established between the two. However, when the daughter-in-law's true identity and past are revealed, the family relationship is plunged into unprecedented tension. The mother-in-law begins to suspect her daughter-in-law's true motives, and the husband also discovers a subtle change between his wife and daughter-in-law when he returns home. In a series of misunderstandings, conflicts and reconciliations, the emotional entanglements of the three gradually surfaced. Eventually, after a series of twists and turns, the knot between the three was untied, and mutual understanding and trust were re-established. The story ends with a warm and harmonious family ending, showing the kindness and tolerance in human nature.