After her husband Gu Mingchuan died mysteriously, 55-year-old retired nurse Tang Qiulan received a death notice, a blue medicine bottle, and a list of seven people sent by him before his death on the day of his funeral. Following the clues, she gradually uncovers the dark secret of Kangning Nursing Group using drugs, fake dementia assessments, and forged guardianship procedures to plunder elderly people's properties, and also discovers that the medical accident she carried eight years ago was likewise a meticulously designed scam. Facing her son's concealment, the disappearance of witnesses, and multiple frame-ups, Tang Qiulan unites with the elderly, a retired criminal police officer, and others step by step to secure evidence, ultimately uncovering the truth of her husband's car accident, reclaiming rights for the seven elderly people, and clearing her own grievance to regain control of life choices.