The survivors are trapped. Cut off from the rest of the world and quarantined as the virus spreads to every corner of the country, while the combined forces of the naval fleet set sail for deeper waters and leave the UK to its fate.
Facing the aftermath of the battle for the island, the groups are separated as the bonds of friendship and camaraderie are violently severed, and they must survive on their own. Every effort to survive is fraught with peril, and those left behind must battle to find some form of safety, no matter how brief that respite might be.
As it dawns on those left behind that the rest of the world has turned its back on them, they must cope with the realization that they are alone, and fight against the brutality that threatens them at every turn. Brutality from both the infected and the rest of the world as it devolves into nuclear Armageddon.
Rejoin Johnson, Peter, Amber, and the others in the immediate aftermath of the island battle, as they strive to find safety, to survive after being truly abandoned.