When the doomsday virus strikes, Cheng Han is a wanted criminal in troubled times with multiple identities. He chooses to stay in this infected city and give up the last chance to evacuate. People who did not evacuate lived as a group. They were in an abandoned hospital in the city. Some people had been infected with a virus called Thornappled, and supplies were about to run out. Sheng Han decided to go out with surgeon Lin to find a new base. Unexpectedly, an unexpected guest knocked on the door of the hospital, which was closed to guard against infected people outside. A man named Cui Ningyu came to ask for help with a person who had just been infected, and found that this man named Sheng Han looked very familiar. Also coming with him was an unidentified man named Qin Ziyuan, who seemed to know a lot about medical knowledge. The four people each have their own agendas and their identities are a mystery, but they actually fall in love in this doomsday city that is about to disappear.
Purpose: When the doomsday comes, some people have no hope of survival, and some people are still burdened with the ultimate mission, but we are all trapped animals in the cage and can only let the virus prey on us. Will there still be the longed light in your heart to redeem you?