Zhou Yancheng eagerly awaits the birth of his child, but the baby's skin color raises his suspicions. His wife, Su Manning, brushes off his concerns by claiming that drinking cola during pregnancy explains it. Acting rationally, Zhou Yancheng secretly arranges a paternity test and discovers that he is not the child's biological father. Rather than reacting impulsively, he calmly gathers evidence, consults a lawyer, and clarifies the division of assets, uncovering the full truth step by step. The story advocates remaining rational and restrained when faced with lies in marriage, resolving disputes through legal procedures, and, after seeing through the deception, parting with dignity from the wrong relationship to begin a new chapter in life.