In her previous life, Ji Ranran was betrayed by her husband, Cheng Chuyan, and their daughter, who joined forces to push her into a zombie horde, leading to her tragic death. After being reborn, Ji Ranran volunteers for an experiment involving the Zombie King Serum, dedicating herself to science in order to save humanity. Yet Cheng Chuyan and their daughter continue to side with Zhou Wenyu and repeatedly hurt her. In the end, Ji Ranran is subjected to blood extraction that leaves her half-zombified. She enters a restricted research zone, choosing never to see the father and daughter again. Only then do they realize their mistakes and live with deep regret.
