The world has been invaded by a virus, and humans have turned into 'corpse suckers' who are afraid of the sun but are extremely ferocious. However, as the virus continues to evolve, corpse suckers have become less and less afraid of the sun, and even two out of ten million are intelligent. The genius girl, the bad girl, the infected, the doctor, the fertilizer dealer, and the pilot escaped from the Empire State Building, only to find that the genius girl's safe underground hospital had been occupied by another group of people. Everyone relies on each other for survival, and they also fight openly and secretly for survival, which is full of darkness. In an environment where the world is becoming less and less conducive to human survival, and under this coincidence, the eleven people are divided into three factions, fighting for survival...
But the real purpose of the Underground Palace Hospital is that everyone must be tied together and rely on each other to survive together.