影片的主线是成勋对俊硕的感情，从一开始不屑，慢慢敞开心扉，几近成为亲人，到知晓他就是杀父仇人的难过、痛苦、愤恨、无奈。故事中描写的是长辈和晚辈之间的事，直到最后晚辈离开了长辈。父仇大于天，即使是很小就离开自己的父亲，即使是不爱自己母亲的父亲。最后脚步蹒跚地离去，是为失去生命中第一个像父亲一样对待自己的男性长辈而哀伤。哀莫大于心死。影片中俊硕问成勋兄弟是什么，俊硕说，只有一起哭一起笑一起痛过逃跑过饿过肚子的才叫兄弟。就是毫无理由的支持和一个电话就飞奔过来的关心，不要说现在社会人心不古，从来人心都不古，怪只能怪自己当初没有看清楚。要一辈子的人，怎能轻易交付真心？结尾时成勋撕掉俊硕给的机票，大概是彻底斩断了自己和他之间的恩怨，从此各自为政，无论谁走阳关道都是自己的事情

The main line of the film is Sung Hoon's feelings for Jun Shuo. The sadness, pain, resentment, and helplessness of killing one's father and enemy. The story describes the affairs between the elders and the younger generation, until the younger generation finally left the elders. Father's hatred is greater than the sky, even if he left his father when he was very young, even if he didn't love his mother. In the end, he staggered away, mourning the loss of the first male elder who treated him like a father in his life. th. In the film, Jun Shuo asked what Sung Hoon brothers are. Jun Shuo said that only those who cry together, laugh together, hurt together, run away, starve and be hungry are called brothers. It's just the unreasonable support and the care that came rushing over with just a phone call. Don't say that people's hearts are not old now, and people's hearts have never been old. I can only blame myself for not seeing clearly at the beginning. How can a person who wants to live a lifetime give up his sincerity easily? At the end, Cheng Xun tore up the air ticket given by Jun Shuo, probably completely cutting off the grievances between himself and him, and from then on, each went his own way, no matter who took the Yangguan way, it was his own business