Wu Yimo never thought that he would sneak into a broken family as a "son". Stepmother Lin Wanqing appears gentle and virtuous, but secretly she is the mastermind behind the manipulation of underground banks. In order to obtain evidence, he disguised himself as a cowardly and taciturn stepson. While pretending day after day, he found that he was actually enjoying this dangerous psychological game. When his stepmother's temptations become more frequent, and when undercover missions begin to overlap with his personal desires, Wu Yimo must choose between exposure and sinking. This is an identity exchange between hunter and prey, and a fatal experiment on the abyss of human nature.
