Hunter Lin Mo goes deep into the high-risk infection area, just to capture the special mutant code-named "Source Strain" in exchange for the medicine and peace he needs to survive. When he finally locked the target after going through many hardships, what appeared in the scope was his son who "died" on the first day of the virus outbreak five years ago. Children's clothing of the past hides inhuman scarlet pupils, and the bargaining chip for survival instantly turns into an ethical dilemma. Between the hunter and the hunted, between his father and the "monster", Lin Mo must make a choice - whether to complete the transaction and hand over his son as a "specimen", or to take him at all costs to escape from this wasteland ruled by greed and viruses.
