Because of the experience of losing his family when he was young, Nan Shun (Kwon Sang-woo) lost the ability to feel pain. In his world, all physical pain is imperceptible. The seemingly good defect has brought many negative effects to Nan Shun, and slowly, even his heart seems to be numb. At this time, a girl named Zhu Dongxuan (Jung Ryeo-won) appeared in his life. Unlike Nan Shun, Dongxuan can not only feel pain, but also be extremely sensitive. The slightest pain may be fatal to her. But even so, Dongxuan is still a lively and cheerful girl, and such characteristics gradually influence Nan Shun. The two of them initially disliked each other, and were attracted to each other, and melted each other's hearts in a series of events. But the two who feel the opposite are facing many tests. In the end, can the two join hands and go all the way... This film is adapted from the comic of the same name by Korean cartoonist Jiang Cao. Many of his comics have been adapted into movies and TV series.