On the night of the zombie siege, Shen Zhao personally pushed her ex-boyfriend Lin Yan, who had betrayed her, into the zombie horde. Three years later, he knelt down to her with a group of corpses and begged for help. Behind him was the trembling family - and she was the only one who could stop the tide of corpses from swallowing up the last fortress. When the mute doctor silently handed over the needle, when the girl heard the tide of corpses whispering "Mother", when the firefighter with the robotic arm lit explosives in the basement - she finally understood: what she really wanted to save was not them, but her own heart that had not yet died.