The protagonist, an ordinary office worker who graduated half a year ago. She is described as having a normally pale face and a hobby of browsing survivalist forums, watching survival-themed movies, and joining enthusiast groups to discuss survival topics. Her family and friends teased her for having a persecution complex. She boarded a crowded train at Shunyang Railway Station in Jiang City on the 26th day of the 12th lunar month during Spring Festival travel season. She was bound to the Doomsday Train System and sent to a beginner instance involving a high-rise fire at Qing Shu Hotel room 1501. She discovered she could trigger her Polaroid photo box into a Magical Memory Box that can convert items from photos into reality.
