Hig, bereaved and traumatised after global disaster, has three things to live for - his dog Jasper, his aggressive but helpful neighbour, and his Cessna aeroplane. He's just about surviving, so long as he only takes his beloved plane for short journeys, and saves his remaining fuel. But, just once, he picks up a message from another pilot, and eventually the temptation to find out who else is still alive becomes irresistible. So he takes his plane over the horizon, knowing that he won't have enough fuel to get back. What follows is scarier and more life-affirming than he could have imagined.