After seven years of marriage, the mild-mannered Doo-hyun (Lee Sun-kyun) is at the end of his rope as Jung-in (Im Soo-jung), his wife, is driving him crazy with her endless nagging and complaining. He can't even bring himself to ask for a divorce because of the fights that will follow. When Doo-hyun's company transfers him out of state, it seems like his dream of getting away is coming true. But to his horror, Jung-in surprises him by moving across the country to be with him. Desperate but too afraid to ask for a divorce, Doo-hyun recruits his next-door neighbor and legendary Casanova Sung-ki (Ryu Seung-ryong) to seduce his wife and make her divorce him first. After scoping her out, Sung-ki is intrigued by the challenge and confidently agrees to seduce Jung-in as his career finale. Meanwhile, to give her something to do, Doo-hyun has already arranged for Jung-in to get a spot on the local radio station, shooting her mouth off about life's injustices. As time goes on, Sung-ki eventually succeeds in grabbing Jung-in's attention, and the two slowly grow closer. But Doo-hyun grows to regret his decision and decides to spy on his wife and her lover. He starts to have feelings for his wife again, and does not want to divorce her anymore. In the meantime Sung-ki falls in love with Jung-in. Doo-hyun asks Sung-ki to stop seducing his wife, but the latter threatens that he would disclose to his wife that Doo-hyun recruited him if he comes in-between them. The rest of the plot is about who wins Jung-in's heart.[7][8][9]
With 594,195 tickets sold during the opening weekend of May 18 to 20, the film's debut made a splash atop the local box office, putting up a strong fight against Hollywood films The Avengers and Men in Black 3.[15] Benefiting from positive word-of-mouth, it continued its impressive commercial run, with over 4.5 million admissions in total.[16][17][18][19]
