Three years ago, Lin Wan, a genius virologist, was betrayed by her mentor and her reputation was ruined. The "Xiguang" project she led to repair human genetic defects was completely sealed, which became a lifelong shame for her. Three years later, a virus known as Echo swept the world.
Unlike other zombie viruses, those infected by Echo are not the walking dead. They retain some of their memories and skills, replay their obsessions in the ruins, and even know how to cooperate and hunt. What's even weirder is that their tissue samples contain biomarkers from the "Xiguang" project that only Lin Wan can identify.
The whole world is sinking, but only Lin Wan knows that this is not a natural disaster, but a man-made disaster.
In order to clear up the grievances and find the source of the disaster, Lin Wan embarked on the road of survival and solving the mystery. She met Shen Che, a taciturn but amazingly powerful former member of the special forces. One of the two used a scalpel to analyze the secrets of the virus, and the other used a saber to cut through the thorns in the road ahead.
