An extremely aggressive, airborne virus has wiped out civilization in a short time. There are only a small number of people left - some still uninfected, others are immune. The small group that Amanda, Iris, Dano, their new ally, Ursula, have created is trying to establish a sanctuary for the immune and the uninfected, as well as the children they rescued from the militia; a militia that has brutally taken power in the Stockholm area. The group have entered into a fragile ceasefire with the militia, but the calm is short-lived. A large aircraft lands unexpectedly at Bromma Airport and raises questions: is there a functioning society somewhere? Who are the mysterious newcomers? And why do they want to clean up all traces from the lab where the outbreak began? Everything is turned upside down, and a seemingly fruitless search for a cure begins...