Twin sisters born on the same day, due to family tradition, only one of the twins can change their destiny. One person becomes a high-ranking eldest lady in front of others, while the other person is hidden in the darkness and cannot be exposed to others. The two seem to be two people, but the one who always exists in front of others is the eldest daughter of the Yin family. They fall in love with the same person one after another by accident, but the lover does not know who the person they love is? A car accident strikes, and who is the missing person? Where should the gears of fate go?