Hunter Lin Mo ventures deep into a high-risk infected zone to capture a special mutant known by the codename “Origin Strain,” hoping to trade it for the medicine and security he needs to survive. After enduring countless dangers, he finally locks onto his target. But in his rifle scope, he sees his son, who “died” on the first day of the viral outbreak five years ago. A child's old clothes conceal inhuman, blood-red eyes, and the price of survival instantly becomes an ethical nightmare. Caught between hunter and hunted, between father and “monster,” Lin Mo must choose: complete the deal and hand his son over as a “specimen,” or risk everything to flee with him from this wasteland ruled by greed and virus alike.