Pulse 3 (2008)

Seven years into the invasion, humankind has fled the cities where billions have died from a plague spread through the internet. JUSTINE (17) dreams of a life beyond her squalid refugee camp where all technology is taboo. She discovers the last working laptop and opens it like Pandora's Box. Someone is waiting for her online. And that someone wants desperately to meet her. The only catch, she must return to the city. With a longing that surpasses fear, Justine embarks on a terrifying journey back to the heart of where it all began. What waits there is something she could not possibly have imagined.