O Mal Sun is a 74-year-old widow who realizes she is becoming a burden on her family. As she is roaming the streets, she comes across a photo studio and dresses up for a self-portrait. When she walks out, she mysteriously regains her physical appearance from the age of 20. Making the most out of this once-in-a-lifetime opportunity, she changes her name to O Du Ri, and she decides to enjoy the best out of her youth… (Source: CJ Entertainment)