A strange rain hits the city, infected victims run rampant, and world order collapses. Kane, an adopted son and truck driver abandoned by his family, gave his all in his previous life only to be shut out. On the brink of death, he is reborn and binds to a team-up system. He modifies his combat vehicle, scavenges supplies, and recruits fighters. Facing a city under siege, can Kane survive and confront his former family's pleas?