Madison Kleigh's father is about to take a trip to Mars on NASA's newest spacecraft, the Excalibur. Everyone is excited about the mission, but Madison is having trouble coping. Her father's vocation thrusts her out of her comfort zone into a situation where she has no control over the outcome. As she struggles with his absence, a mysterious package arrives containing an extraordinary stone that Madison quickly learns has a unique power. At first, the stone is a distraction until it becomes the center of attention at NASA. Madison learns the secret of her father's real mission and realizes the stone's ability is the only means of his safe return. Unless unscrupulous agents working for the corrupt leaders of other countries intercept it first.