In Central Park, a homeless man bears witness to the arrival of a strange device. He founds a cult who believes the device is a portal to a promised land. But is it a gift from the Angels of God, or a way to invade Earth at its most vulnerable moment?   Mindy Patoy, a disgraced astronomer working in Portland Oregon, has just learned of an asteroid bearing down on Earth. As word spreads of alien devices appearing around the globe, she is drawn to New York City. There, she finds friends and enemies alike as she struggles to unravel the mystery.   Through the portal, a small band of soldiers struggle against monstrous reptiles to carve out a place for the refugees who will follow them. They cannot hold out for long without resupply and there is no retreat. As the asteroid bears down, time is running out and New York City has become a war zone. Civilization is shaking itself to pieces as factions around the globe battle over the portals. Efforts to stop the asteroid are failing. Is the Song of Earth about to end, or is it just beginning?