An only child raised by a tough-talking single mother, fifteen-year-old Riley has always stood out. A math genius fascinated by the universe, Riley has developed a groundbreaking new way to accurately predict the frequency of dangerous solar flares. Soon he discovers that a huge solar storm is hours away from frying the earth's power grid. With the help of his mom and his professor, the no-nonsense Dr, Clark, he sets out on a race against time to convince the world to prepare for the worst before it's too late. But things take a darker turn when Marshall Pryor, the head of a powerful corporation, learns of Riley's prediction. Pryor thinks the coming global disaster could be a huge moneymaking opportunity, especially if it comes without warning. Dr. Clark's discovery of this terrifying plan instantly makes her and Riley the newest targets of Pryor's murderous wrath. Their only hope is to deliver a warning directly to the White House. As the huge solar storm enters its final stage, Riley, his mom, and Dr. Clark have one last chance to stop the disaster--if they can survive long enough to convince the most powerful man in the world to act.