Dave finds an unconscious Howie and carries him into the residential
streets for safety. The others have been separated and are searching for
each other. Nick falls asleep and misses the pick up.
We meet Lilly and Billy, a brother and sister who are led by their
ineffectual father into a series of devastating situations which results
in Billy being taken by two men and Lilly witnessing the murder of her
father. Lilly tracks her brother and meets up with Nick who, not being
able to find his group, agrees to help her.
Nick finds Billy has been taken to a stately home taken over by a doctor
who claims to be working on a cure. Meanwhile, Howie, who has learned he
is immune, and his group are heading back to the fort when they become
trapped in a safari park.