Elias, former chief scientist of VitaCorp, is framed by his assistant Kai and dies tragically in the apocalypse. Reborn, he injects a self-made serum and disguises himself as a deranged vagrant, gaining viral immunity and a crystal core ability system. When the apocalypse strikes, he navigates zombie hordes unharmed with his powers, wins over the defected mercenary Sofia, and rallies resistance against the shadowy conglomerate VitaCorp. As the investigation unfolds, the terrifying "Zombie Progenitor" emerges mysteriously, and a leftover hard drive fragment reveals a figure identical to Elias, shrouding everything in deeper mystery.
