A torrential downpour of brick-red rain suddenly falls from the sky. Everyone it touches mutates, and civilization collapses within an hour.
Li Tian, a food delivery worker, has long made a habit of stockpiling supplies. He has reinforced his eighteenth-floor apartment into a makeshift safe house.
In the stairwell, he rescues Su Wanqing, a nurse lightly infected by the red rain but not fully mutated. By chance, he glimpses the truth of the apocalypse: the red rain is not simply a virus, but a cruel selection process. The weak become mutated monsters, while those with strong wills can withstand the infection and unlock human evolution!
Zhou, a retired fitter, breaks through the zombie horde to join them, and the trio is formed.
The monsters rapidly evolve with the red rain. The survivors in the building all have their own agendas, while looters lie in wait to slaughter the weak. Zombies devour flesh, but human hearts are more dangerous than monsters.
Li Tian is no saint, but he has principles and knows how to plan ahead. He reinforces the floors, sets traps, gathers supplies, and leads his teammates in clearing out the mutated creatures and fighting for space to survive.
From defending the eighteenth floor to taking control of the entire apartment building, they then expand outward to establish a safe base.
Beneath the ruins of the ruined city, the red rain never stops, and evolution never ends. In this desperate world, they must protect the last glimmer of hope left to the survivors.
