Newborn researcher Oh Sae-byeok, who was working on a project to create a perfect human, went beyond a number of failed works and finally developed a drug that can change everything from height to face through genetic manipulation, although incomplete. However, Chairman Geum Soo-jeo, who invested in the lab, misunderstood the first failure as a vitamin and ate it alone? As a side effect, new changes appear in the body every day. And he started living with her - the only person who can cure the side effects...