Graham continues to take care of his now adopted family after 98% of the population is killed by the virus. As expected, they encounter their share of apocalypse scumbags and people driven nuts by the collapse. Despite that, Shaw does a good job of keeping the virus itself as the main antagonist.
His group has an interesting dynamic with the neighboring prepper group holed up in their compound. Graham and his group are immune survivors, but the preppers are just a group of normal people who acted quickly enough to avoid exposure. But, that makes them extremely cautious about contact with the outside world as only a single person or mistake could potentially infect their entire group. Since none of them have been exposed, there is no way to know who among them may be immune. With only 2% immunity rate, they can't afford to take any chances.
Despite that, they went out of their way to help out Graham's group, thanks to some somewhat-invasive monitoring of their neighbors. As a result, the small adopted family nearby has become the living replacement for their long dead TV soaps and dramas. After breaking protocol to help them in an emergency the two are now in constant contact and mutually supporting (as much as can be.) Once again things go to hell in a handbag for everyone at the same time. But now, they can't afford to help out after the last time saw one of their own infected, though luckily immune, but now sepperated from his daughter as he was forced to move in with Graham. When a fire breaks out at the prepper camp, Graham doesn't come back from town, and emergencies pop up in every direction... things escalate to a crazy degree for everyone.