Shen Zhiwei, a living-alone editor, received a security camera alert late at night that there were two people in her room. But she clearly lived alone at home. The strange noise coming from under the bed made her dig out the old phone of her missing sister, Shen Zhixia. A strange message guided her to escape, yet it knew her every next move like the back of its hand. To find her sister, she investigated together with Cheng Ye, who stepped in to help, only to discover that distress videos could be forged, escape routes had long been rehearsed, and even her own fear had become a commodity paid for and watched by others. When the deleted eleven seconds reappeared, she finally realized that the person who kept saving her might also be watching her from behind the lens.