The world watches the sky and waits for the end.
A colossal object has appeared without warning, moving toward Earth on a course no one can fully explain. Officials insist they understand the danger. Scientists offer carefully measured reassurances. But John Reams, an amateur astronomer who first discovered the object, has seen something the broadcasts cannot account for.
The object is behaving in ways that should be impossible.
As fear grips cities across the globe, botanist Cali Bowman seeks refuge with her father, renowned professor Richard Bowman. Yet when the expected catastrophe takes an unexpected turn, relief quickly gives way to disturbing questions. Strange signals linger in the air. Authorities become evasive. And something connected to the object may have reached Earth unnoticed.
Drawn together by fragments of evidence, John, Cali, and Richard find themselves inside a mystery larger than any of them imagined. Every answer leads to another contradiction. Every reassurance conceals another secret. The closer they come to understanding what happened, the harder it becomes to know whom they can trust.
Something has crossed the darkness between the stars.
It has not announced itself.
And whatever it wants, humanity may already have given it the opportunity to begin.