There is something strange about St. Opal Lightfoot's Academic Residence-silver walls, static electricity and the fact that none of the kids have any memory of their families. The school's strangeness is the least of Bernie Banks' worries though. He's failing almost every class and is in danger of being kicked out of school-the only home he has ever known. When Bernie and his solar project teammates discover an underground world, they learn that both the world above and the world below the surface are in danger from what archaeologist Peter Potstop is doing to the Great Pyramid. Can Bernie and his friends get to Egypt in time to stop both worlds from exploding? Do they even know how?