Danheng, who was under pressure to get married, walked on the streets of the past, and the past came back to him.
She thought of the "good friend" she had grown up with, a love affair that had never been revealed, and a dead first love.
The cause of his death is still unknown and has become a secret unsolved case.
But the dead people have stayed in the past forever, while the people who are still on the timeline must face the future. When she is determined to forget the past...
On the same night of autumn and summer twelve years later, she met "him" from the past...
Motto: Love never fades.