The boy dies unexpectedly, and his father begins to visit his classmates to find out the cause of death. Two of his best friends who used to talk to him about everything, one is missing, and the other has transferred to another school; what happened to the boy in his last moments before his death? The director uses parallel narratives to outline the appearance of youth, exploring issues such as school bullying and rebellious growth, deconstructing a cold and unbridled poem of youth, which is not only similar to the Korean version of "Nine Winds", but also more cruel and suspenseful, and there is also a group of handsome Korean rookies competing in charm and acting skills.