In 2030 AD, in an explosion at a research institute, the experimental subjects turned into zombies and infected the entire world.
In the underground base, Xi Yuan, as an experimental subject, discovered the other side of the doctor who was so nice but cold as if he was owed money, as well as the darkness involved in the explosion in the research institute.
(The story of a doctor and an experimental subject fighting against each other's wits and courage, and finally working together to successfully save the world)