The story of Lin Mo, an ordinary employee, struggling to survive in the collapsed city after encountering a doomsday disaster in the bloody dusk. Blood rains suddenly fall, unknown viruses rage, former relatives reveal their selfish nature under the pressure of survival, and family ties are twisted and broken. Lin Mo accidentally awakened the "Survival Guide" and was able to sense threats and detect resources, but at the cost of mental strength.
He not only has to fight against alienated monsters and deal with the threats of gangs of thugs, but he also has to hold the bottom line amidst family strife. As the black tower emerged in the city center and the infected continued to evolve, the cruel truth of the "safety zone" of the stadium gradually emerged. Lin Mo was forced to make repeated choices between humanity and survival, uncovering the shocking secret behind the disaster related to the fate of the black tower and mankind.