Marooned on Earth for thousands of years, Tweeskzaht has remained hidden from the humans who have now unwittingly made themselves a target for a war that has raged for millennia. To save herself and her new home, she must get the help of her ancient enemy. But first, she needs a new host. Mike's degenerative disease left him in a wheelchair with the certain knowledge that his life could end at any time. Working as a freelance computer technician from his home, he is cut off from the world he longs to join and the life he craves. When a beautiful attorney comes into his life telling him he has been chosen to be the executor for a man he never met, Mike is torn between taking a crazy chance with an alien parasite or continuing on his current path. Mike's decision, he finds out, is not only his personal liberation from his deteriorating body with the help of Tweeskzaht, but the chance to reroute Earth from an inevitable fate. However, it comes with a very high cost that involves not only his own life but the lives of people he has come to care about.