When the marriageable age unmarried female youth An An (Bea Hayden decoration) is an ordinary white-collar advertising company, in order to get rid of her ex boyfriend harassment move, the new neighbors are brother and sister, brother Pan Xiaozhe (Duan Yihong decoration) is a view of all like biology postdoctoral daily affairs with the biology knowledge, sister Pan Xiaoxing (Liu Yase decorated) optimistic. An advertising proposal competition, ferial often annoying Pan Xiaozhe by biological knowledge accidentally help to Ann, Ann successfully promoted. An advertising company to be purchased, American headquarters airborne to the handsome young director of operations Li Xia (Leon Dai decoration). Ann Li Xia dark born affair. In the good friend Zhou Jiani (Xie Yilin decorated) reminded, once in the emotional repeatedly by defeating an awareness of rules and the theory of evolution feelings like: eliminated weak, survival of the fittest. She decided to ask Pan Xiaozhe for help, the use of biological scientific knowledge help himself to talk about a successful relationship......