In Xinzhou City in 2123, the heroine Lin Wan, who once worked as a forensic examiner for the Criminal Investigation Team, made a mistake that resulted in the death of a colleague. After resigning, she became a private detective and awakened the "Space Track Detective" system (you can touch objects to see their spatial movement tracks in the past 24 hours). Recently, there have been 71 cases of missing tenants in "Guixu Apartment". The 72nd missing person is the brother of best friend Shen Qingtang. After Lin Wan took over, he used the system to track that the missing persons had entered the cracks in the underground space of the apartment, and gradually identified the murderer as the property manager Su Muyuan. After his wife died in the space cracks, he developed a device to kidnap tenants to experiment with space stabilizers. Lin Wan cooperated with Gu Zhao, a researcher at the Space Administration, and finally found the entrance to the crack, exposed Su Muyuan's crimes, and rescued the victim.
