"Civilization slipped into its second dark age on an unsurprising track of blood, but with a speed that could not have been foreseen by even the most pessimistic futurist... and the world as it had been was a memory."

The event became known as The Pulse. The virus was carried by every cellular phone operating in the world. Within hours, those receiving calls would be infected.

Clayton Riddell, a young artist, knows he has to reach his son before the boy switches on his phone. And time is running out.