In this third book of the Alex Faraway series, it has been 4 years since Alex Faraway blasted off from Earth to join his once-missing father on Mars. Because of his past heritage with Mars, Alex has transformed into an Earthian with all the new abilities his Martian cousins possess. The orphaned Martian, Rainah Onyodee, has found a new home with Alex's mom, Elizabeth, and is finishing high school in the small farming community of Delta-Town. Old Elliot, the astronomer, has settled down with Rosie in her café where Elizabeth works and where he keeps a roof-top vigil each night, tracking the approach of Planet X (the mysterious, rogue Nethlin World) as it nears its ten-thousand-years encounter with Mars. But, a new and more sinister entity - a Dark Man - has joined forces with the scheming 'Others' in order to fulfill their ultimate end-game: The complete destruction of the hibernating Martians, still asleep in their Time Tombs under the sands of Mars, as well as the huge Mars Biosphere Dome which holds all the surviving life that once thrived on Mars long ago.