A former arm-wrestling champion raised in the U.S. returns to South Korea for a tournament that could return him to glory, but he finds his life complicated by the appearance of the biological family he never knew.

Beauty Water looks like a common skin cosmetic. But unlike other cosmetics, people can sculpt their skin with it like molding clay and change their appearance. An ordinary girl, Yaeji, comes across the 'Beauty Water' by chance, and her endless desire to be the most beautiful woman brings her unimaginable disaster.