Carl Condors is an engineer with nightmares. A fellow passenger on a flight tells him her Hopi grandmother taught her to help ease such dreams. But the dream is more than she can deal with and so she takes him to meet her grandmother.The aged woman tells them they have come back together for a purpose. One they had worked on before and failed to accomplish. Now that cycle of the game has come around again and they must work together to accomplish it this time.Serendipity brings them into contact with others who have received the "call to arms" and together they work toward their common goal while trying to fight off the enemies - those who have stopped them before - and achieve a place of sanctuary for the human race before time runs out.