A man and his shocked daughter Nancy arrive at a guarded zone requiring a supply fee for entry. After losing all their supplies to mutants, the man offers to work in exchange for entry, revealing he is a pharmacist who can provide urgently needed antibiotics. The guards agree to let them in if he can find five unexpired antibiotic boxes by sundown. After securing the supplies, they gain entry, but tension rises as others warn that those bitten by zombies are shot on sight. The man worries the security scanner might detect Nancy's unique condition, leaving their safety uncertain.