Some people marry late, not because they can't find a suitable partner, but because they have an impossible person hidden deep in their hearts. This person is their lover from the past.
Before Mo Yao met Xia Yiming, they were still immersed in the old time of waiting for their ex, alternating with sadness and joy.
Until two men and women who stubbornly wait for love meet again...
Who betrayed his old lover first?