Champion of mixed martial arts of women - 'Shin Eun Hye'. The strongest woman in the world, but she is too lonely because she doesn't have a boyfriend by her side. Men are reluctant because she is a martial arts champion and does not resemble a woman at all. When she is in the street thinking, she suffers a car accident. But when she opens her eyes, all the toned muscles are gone and she is a beautiful girl? The most powerful girl in the world!