That year was supposed to be Zeng Jiajun's best age, but a crisis suddenly occurred. He found himself sick, very sick; and soon after, his beloved grandmother also left him. He seemed to be trapped in a southern summer, surrounded by endless darkness and humidity... Only one girl seemed to be the sunshine in his life, but the word "love" seemed to never be uttered. And finally, his parents, who had abandoned him for many years, appeared and took him to the north, which seemed to have a clear and refreshing autumn... With the help of fate, he said goodbye to that girl and the familiar city he was attached to. Ten years later, while he was tossing and turning in the hospital bed due to pain, he met a familiar stranger. The two old friends began to communicate for several months, and it seemed that during this communication, he opened the floodgates of memory and learned the story between his grandmother and grandfather. And the parents who abandoned him seemed to have their own reasons... When pain has become a habit, the most meaningful thing is when to leave it completely... Tick, tick, tick, tick, tick, tick, tick, tick, tick, tick, tick, tick... The sound of the second hand moving. It is also the sound of my longing for you. When I was twenty-four, I met myself again ten years ago, and I also met you fifty years ago...