In the future world, a technology called "memory retrospection" is applied. Through special equipment, the remaining brain waves of the deceased or comatose can be accessed, and the memory of the last 72 hours can be fragmented and visualized for criminal investigation, medical treatment or last wish exploration. However, this technology has strict limitations: memory is subjective and may be distorted, the recipient's mind will be affected, and the law strictly prohibits its use on living, conscious people.
One-sentence summary: In order to find the whereabouts of his missing sister, a former "memory regression" technician did not hesitate to access the memory of a mysterious coma without permission, but found clues to a huge conspiracy, and he himself became the target of being hunted.
