Gu Yanbei, a female housekeeper who works as a firearms designer, has a perfect life of her own, with a handsome boyfriend, loyal girlfriends, and a complete family. Originally, she lived an ordinary life under such a perfect layout, but due to an accident, she met the diamond king Laowu, who was obviously the second male lead but still exuded the aura of the leading male, and the youthful young hottie - He Muchen. Between these two relationships, how should Gu Yanbei choose? Look at the life of the mysterious girl Gu Yanbei.