Trailer: Happy Ending

Yeong-joon who loves a mysterious woman named Seo-ra succeeds to change the past by visiting a woman with mysterious powers. However, she is now married to a loan shark named Cheol-jae in the changed past. Cheol-jae lives in captivity under Seo-ra and plans a new love and life, while Yeong-jun agonizes over Seo-ra's happiness. The fate of these men and woman who have changed their pasts, unfolds.