Yolanda is wounded and will turn into a zombie in thirty minutes, and her companions beg for help. A survivor offers a high-tier genetic serum—meant for trade—to save her. A physically weak man, admitting he has no superpowers, accepts the serum and volunteers to try, asking someone to come with him. Another person scolds a freeloader for wasting sun but gives a toxin neutralizer. The group departs with serum and neutralizer, desperately racing the thirty-minute countdown to prevent Yolanda’s transformation.