Lance, Nate, Cassie, Eric, and Ethan are your average teenagers. They enjoy hanging out but best friends Lance and Nate are practically inseparable. Their friendship only bested by biological twin brothers Ethan and Eric. Cassie meanwhile has a sibling of her own, a younger brother named Jeremy, who tags along with the gang from time to time. This Summer marks the end of their junior year of high school. But just as the youngsters settle into their Summer vacay, disaster strikes! A massive build-up of energy in and around the sun discharges towards Earth, resulting in an ultra-powerful solar flare that upon impact, wipes out almost every living thing! It also pulverizes the world’s grids with an electromagnetic pulse, rendering all electronic devices completely useless!