Oh Ha Rin (Yeri) is haunted by the tragic suicide of her first love, Ji Seo Jun (Hongseok), which occurred on her 18th birthday a decade ago. While sorting through his belongings, she discovers eight hidden photos and accidentally burns one, magically transporting herself back to the exact moment captured in the image. Realizing she can now time travel, Ha Rin becomes determined to save Seo Jun's life. However, she must be careful, as each burned photo represents a single opportunity to change his fate. With limited chances to prevent his death, she embarks on a desperate mission to alter the past and rescue the person she loves most.