The end-time red rain strikes, and I am locked out and unfortunately killed by my adopted family. Reborn back to the eve of the catastrophe, I awaken the end-day team-up system. I modify heavy trucks, stockpile supplies, and assemble partners each with their own specialties. After the disaster strikes, I settle old scores, and relying on the system's storage, weapon, and enhancement abilities, the squad fights against mutated infected people and vicious forces, pursues the anti-virus antidote, and desperately seeks a way to survive in the cruel doomsday despair.