While on a live feed, a massive “bright, shimmering sphere of light” appears overhead. It hovers there for a while and then disappears, leaving everyone to wonder what it was. It’s “The Sign,” but a sign of what? God? Aliens? A hoax? The video goes viral around the world, but Gracie is the only reporter on the scene and runs with the story. She travels from Antarctica to Egypt to try to get to the bottom of this mystery.