Shen Nian'an and her best friend fell in love and became pregnant at the same time, but she always envied her best friend's "action-oriented" boyfriend. Until at the hospital, she saw with her own eyes that the man who was so attentive to her best friend was actually Lu Shiyan, her husband of seven years whom she had secretly married. Even more cruelly, Lu Shiyan not only hid the marriage, but also maintained a double relationship between the two for many years. Faced with her best friend's misunderstanding, everyone's accusation, and her husband's betrayal, Shen Nian'an decided to leave completely. But when she truly disappeared, Lu Shiyan began to realize what he had lost, and the relationship between several people moved towards a more complicated situation.