Kim Hye-ja, an unemployed 20-something, wastes her days away not doing much of anything. One day, she meets Lee Jun-ha, a reporter hopeful.
Hit by a sudden family tragedy, Hye-ja's first instinct is to use a magical watch from her childhood that can turn back time.
Hye-ja struggles to come to terms with her new life as an elderly woman -- as do her parents. Jun-ha tries to process a personal loss.
Realizing her missing dog is at Jun-ha's house, Hye-ja attempts to bring him back. Kim Yeong-su orders food he can't afford from Lee Hyeon-ju.
Jun-ha works a job at a place that scams the elderly -- puzzling Hye-ja, who doesn't understand why he's not pursuing his reporting career.
Yeong-su's channel finally attracts more viewers. Jun-ha, frustrated by his situation, gives Hye-ja a glimpse of the hurt he carries.
Hope glimmers for Hye-ja when she spots her watch being worn by another person. Hyeon-ju battles a troll on Yeong-su's channel.
Chanel gets ready to go see her son, but Jun-ha has bad news for her. Hyeon-ju is not amused when Yeong-su tells his viewers he was her first love.
While police question Jun-ha about his last encounters with Chanel, Hye-ja wonders where she has gone.
Sensing Jun-ha is in danger, and suspecting a nefarious plot involving insurance fraud is at play, Hye-ja masterminds a plan to save the day.
Hye-ja's reality comes into focus. In her earlier days, she was a carefree romantic who just wanted to experience her first kiss with Jun-ha.
Domestic bliss is fleeting for Hye-ja and Jun-ha, whose work gets him into trouble. Lee Dae-sang realizes his mother's love for him.