It starts with a cough, a few aches and pains and a weird spot on the back of your neck.

It is HAV3N, the worst disease the world has ever seen.

With friends and loved ones dying in their thousands, the villagers of picture-postcard village Great Sheen are convinced this is more than just media hype.

Their entire existence is under serious threat. So they barricade themselves in - and the infected out.

Seventeen-year Josh, his sister Martha and their two friends survive the onslaught of HAV3N, along with only seventy-eight other villagers.

But they now face a very different future. One in which they could be the only living teenagers in the world . . .