Park Eun-jin is a by having an abysmal track record in relationships. Free wheeling and adventuresome, she is also reckless and irresponsible, pushing the timid and the attentive falling for the dreams of their love-conquers-minor-details-like-my-lover's-married-status variety. After a magnificent breakup with a co worker, a cab ride is shared by Eun-jin with Kim Hyeon-seok, a nerdish young man. Against all odds, they commence a courtship and finally opt to get married. 1 night out a funny text is found by Eun-jin. She enlists the aid of her boy friend So-young and also her doofus brother Eun-gyul that is ex-marine for to the bottom of what she suspects is the two-timing affair of Hyeon-seok. What she finds out is something else.