Ye Fan finds himself caught in a Red Alert session when catastrophe strikes. A noxious odor renders him unconscious. He regains awareness to a horrifying discovery: the undead have infiltrated his home. Before despair overtakes him, an otherworldly voice echoes through his mind. Nana, manifesting as his digital secretary and tactical aide, greets him with striking familiarity. Proclaimed as the wasteland's unlikely commander, Ye Fan must now lead humanity's final stand against the zombie plague.