Have you watched the Korean drama "Samurai Baek Dong-su"? Do you like the sad but handsome Yun in it? I like Yun, but I hate his tragic fate. Therefore, I decided to give him a different life according to my heart. . . What kind of story will happen when a killer who has been working as a killer for more than ten years travels to our current era and meets our heroine Yu Wei, who is careless on the surface but delicate in her heart, and a person like He Dongxiu, our Yun. . .