Wen Ci, an elite overseas agent, hides her formidable abilities and disguises herself as a gentle, demure ordinary girl to marry into the Lu family, all to uncover the truth behind the murder of the benefactor who once saved her. After their wedding, she plays the role of a docile and proper wife at every turn, while her husband, Lu Jin, initially believes she is simply innocent and harmless. During an unexpected encounter outside, Wen Ci accidentally reveals her true combat skills and personality, shattering her disguise completely. Lu Jin sees through her act but chooses not to expose her. Instead, he watches with amusement, playing along as they test each other and engage in a battle of wits. As they spend more time together, he gradually falls for her amid their endless games of strategy, developing genuine feelings he can no longer bring himself to let go of.