A former boxing champion turned gang member seeks redemption as a small-town boxing coach, while becoming entangled with an amnesiac prosecutor and a complex web of lies surrounding their shared past.

Former producer Kang Soo-hyun and discarded trainee Yoo Jin-woo join forces, each pursuing their dreams amid challenges and new opportunities.

Born in 1981, So Won should be in her forties now, but when she became twenty in 2000, she encountered a witch by chance. So Won was cursed by the witch because she turned down her favor. The curse was "to live as a twenty-year-old woman for the rest of her life." At first, she thinks it will be a blessing but soon starts suffering from the pain of losing her beloved ones and her life re-setting every year. One day, So Won happens to spot the witch in a photo, so she heads to the resort in the photo's backdrop. To lift the curse, she sneaks in as a resort staff and meets Kang Hyun and Sang Wook there.