Five hundred years have passed since a man took that one small step on the moon. Now humankind is ready for the next giant leap. The starship, ESC-1, the most ambitious and costly project ever undertaken, embarks on its historic journey. The destination is light-years and decades away but Captain Tara Nelson and crew believe they are ready for any challenge. However, millennia ago, events were set into motion that will turn their new home, a pristine moon circling a ringed gas giant, into a cosmic bull's eye. As the budding colony begins to thrive, they discover a strange amaly. From the star system's outer reaches, hordes of asteroids are plunging toward their world. Initially, surrounded by 26th century techlogy, it is little more than a nuisance. Then, inexplicably, that techlogy begins to fail. Now, to their horror, they are powerless, completely at the mercy of the deadly, onrushing calamity.