In a past life at the National Day amusement park, Shen Nian and her daughter suffered sudden asthma attacks, and her husband Zhou Bingchuan along with his colleague Song Sisi caused the tragedy to happen. Shen Nian unexpectedly was reborn back to the morning of that day; she prepared medicine in advance, preserved evidence, pursued accountability through legal channels, and made those who neglected their duties pay the price. In the end, she protected her daughter, returned to the workplace to lead the revision of amusement facility safety standards, and protected the peace of more families.