When her twin sister mysteriously disappears, legal star Shen Yanzhi is forced to “play” her sister, only to cross paths with He Yining, a prosecutor who used to be her rival. In a power game at a top law firm and a case worth tens of billions involving both politics and business, two women who seem to be on opposite sides must join forces amid lies and danger to uncover the truth and protect the ideals they both hold dear.