My Revenge in the 1980s

Betrayed and killed in her past life, she is reborn into the 1980s just as her toxic fiancé proposes. Tearing up the betrothal and exposing her backstabbing friend, she takes back her dream position at the city hospital. But she soon uncovers a shocking secret: her ex's young sister has also returned from the future. Facing sabotage and fierce rivalry in the emergency room, can she use her elite skills to protect the girl and exact ultimate revenge?