Sae-Hee (Park Ji-Yeon) and Ji-Woo (Ha Jung-Woo) are a young couple two years into their relationship. Though he never acts on his impulses, Ji-Woo has something of a roving eye and Sae-Hee is intensely jealous and fearful that Ji-Woo will soon lose interest and leave her. Believing that Ji-Woo is bored with seeing the same, boring her all the time, Sae-Hee takes drastic action, leaving him without warning and having drastic cosmetic surgery, taking on a new face, which she hopes to use to snare him again, under an assumed identity, once she has healed. But when Ji-Woo shows interest in this new and "improved" Sae-Hee (Sung Hyun-Ah), it triggers only more self-doubt and loathing. After all, he may love the ‘new’ girl, but does this mean that he has rejected the old? Sae-Hee is utterly trapped in her own insecurities, a situation that prompts Ji-Woo to take drastic action of his own.