In a zombie apocalypse, Karen, the eldest young master living in exile, is brought back by the Voss family. Yet he suffers constant neglect and favoritism, framed by his adopted brother Ethan. Abandoned by his family, he is attacked by Ethan and thrown to zombies to die.Reborn with memories of the apocalypse, Karen cuts off illusory family bonds. He gathers loyal brothers and founds the Umbrella Mercenary force. He crushes villains step by step, seizes wasteland resources and rises against all odds. The cold Voss family learns the whole truth and drowns in endless remorse. Karen rewrites his tragic fate, dominates the wasteland and becomes a legend.
