Introduction: Betrayed by her family, cheated on by her lover, and diagnosed with a terminal brain tumor... Sarah loses everything and finally gives up on life. But just as she’s ready to let go, a grim reaper appears with an unexpected offer: "Live four lives—in the bodies of the dying." Thrust into other people's lives, Sarah sets out on a thrilling path of revenge against those who once tormented her. Along the way, something changes—she starts to rediscover the will to live. And watching over her through every lifetime is one man: John, the only person who has ever truly loved her. They meet again in her final life. This time, he swears he won’t let her go. But time is running out. A love that defies death— Will this life finally bring a happy ending?