We were watching the sky. They were already here.The pulse hits without warningIn one harrowingly destructive instant, a mysterious seismic pulse in the Scottish Highlands rips away all semblance of global security.Complacency grew in the years since Dan McCarthy brought humanity into contact with intelligent aliens, but those days are gone.When peace is shattered, fear takes over.The stakes rise without mercyAs the pulse's chaos spreads, it becomes painfully clear that Dan's teenage daughter Piper - a child born like no other - might hold humanity's only hope of averting total disaster.The danger to Earth is imminent. The danger to Piper McCarthy hardly bears thinking about.And this threat isn't coming from the stars.This time, it's been here all along...