In 2005, Lin Suxin's eight-month-old son was abducted through a conspiracy between her older female cousin and her cousin's husband, Zhao Fugui. In her previous life, she spent fifteen years desperately searching for her son, enduring countless hardships as her life fell apart. Just when she had finally gathered clues and was preparing to report the case to the police, she died in an accident. Reborn overnight, she returns to the day before her child goes missing. She does everything in her power to prevent the tragedy, yet it still happens. This time, Lin Suxin puts her despair aside, relies on the memories of her previous life to earn an honest living and become self-reliant, and quietly continues gathering clues while cooperating with the police to investigate the human trafficking network. As the investigation deepens, she gradually discovers that the kidnapping case conceals an even more complicated and sinister conspiracy.