Twenty years ago, a wealthy British financier disappeared near Ubar, the fabled lost city buried beneath the sands of Oman. Now, an expedition of scientists, led by the financier’s daughter, is finally setting off for the legendary metropolis to unlock the desert’s secrets. What they find, however, is more beautiful than they ever dreamed—and far deadlier. Within Ubar is a powerful energy source that could fuel the entire earth above—if it can be harnessed. But before they can resurface, the explorers become trapped. For the same life-giving force that can save the world is about to set off a giant, sweeping storm awesome enough to annihilate everything in its wake . . .