A história verídica de Kathryn Bolkovac, uma ex-policia do Nebraska, Estados Unidos da América. Foi trabalhar na missão de paz da ONU como pacificador na Bósnia do pós-guerra e que mais tarde veio a sair, depois de ser demitida por expor o envolvimento dos agentes da ONU (UN) no tráfico sexual no país, tendo ela processado os seus empregadores.
Lin Xi who's known as the "witch" in the translation industry reunites with ex-boyfriend Xia Yicheng. Eight years ago, she broke up with him for the sake of fulfilling her mother's wish for her to become a professional interpreter for the United Nations. Eight years later, Lin Xi has become the youngest chief interpreter at Huasheng while her ex Xiao Yicheng has become the chief technology officer of a communications company, which also makes him her potential client. In order to land a contract with Xiao Yicheng, Lin Xi has no choice but to keep dealing with him. She helps his company go public and even though it seems that Xiao Yicheng is out to get revenge on Lin Xi, he actually doesn't have the heart to be mean to her. Work rekindles their passionate relationship and Xiao Yicheng gradually comes to understand that reason she broke up with him. Together, they work hard to realize their dream of "speaking for the country".
