In the small town of Hualin, at this time, the taxi driver Wang Xiang (played by Fan Wei) never dreamed that he would still have a chance to meet the person he most wants to meet in his life, but is also most afraid of meeting. Is it an enemy or an old friend? When you encounter it, you have to explain it to yourself and to your son.

In the small town of Hualin, at that time, the train driver Wang Xiang was a high-spirited train driver who could drive twenty steel giants but couldn't manage the trivial family of three, the factory was crumbling, and crises were looming everywhere.

A package of unidentified broken corpses was like a stone smashed on the water surface of the birch forest, and it also hit Wang Xiang's mind. The ripples lasted for 20 years, until the leaves turned yellow in autumn, and never stopped.

The lost father, the dead lover, and the reunited old friend are trapped in three different eras due to an unsolved mystery, just to pursue a truth that spans the past, present, and future. When the mystery is revealed, Time and space merged into one, leaving only the elegy of fate in the long season.