You can run. You can hide. Just don't pick up.

The event which propels civilization into its second dark age is known as The Pulse. The virus is is carried by every cell phone operating in the world. Within hours, those receiving calls will become infected.

In Boston, artist Clayton Riddell flees the explosive heart of the city. He knows he has to reach his son before the young boy switches on his little red phone. And time is running out . . .