After the death of her parents, Joo Ah Ran plots to ruin the family that destroyed hers. She seduces and marries the son of her enemy, Shin Hyun Woo, who discovers her plan belatedly. With a new face, courtesy of plastic surgery after meeting with a car accident, he decides to exact his own revenge upon her.
Sakahira Riku, a first-year high school student, is jokingly pushed on the shoulder by his friend Tasaki while swimming by the pool, and falls into the pool with Mizumura Manami, who is next to him. The next day, when he wakes up, he finds that his body has been swapped with Manami's. Both are confused and try everything to get back to normal, but nothing works. They are forced to desperately exchange information about their families, friends, club activities, etc. in order to play the role of each other.
Xia Le Di was an arrogant, self-absorbed socialite before her father's bankruptcy left her penniless. She believed that it happened because his competitor stole "Mona Lisa," a revolutionary makeup technology that his company developed. She vowed to get it back. She went undercover at JEALOUS, the rival company, working as an assistant to Chang Yu Jie, the heartless operation manager/lead makeup artist. While she focused her investigation on him, her romantic interest wandered to his charming half-brother Chang Shao Feng. But unbeknownst to her, the half-brother was the real culprit behind the theft.
