The Last Train of Youth tells the story of the protagonist Lin Nan, an ordinary student who is about to graduate from high school and enter college life. He is introverted, not good at talking, and has average academic performance. He is not a sunny and handsome boy, but he has another side. He is a well-known writer in But at this time, his girlfriend who had been in love with him for a year suddenly disappeared, leaving only a letter with the content... Faced with everything unexpected, Lin Nan was at a loss and fell into deep thought...