Number 6 book in this series, does have the usual summation about the progress of the former books, a procedure the author could have eliminated to a much smaller coverage in the book. There are several different lines to the story, three of the plots have to do with acquiring an item referred to Excalibur. It is a needed item by all parties to control the master guardian. We learn the story on how the Shadow Artad in the disguise of Arthur, from the Camelot story, used Excalibur to defeat the Shadow Aspasia in a mutual mortal defeat of both of them. Merlin, a rogue Watcher, took Excalibur from the Watcher site and hid it at the top of the known world (a ridge on top of Mount Everest), hoping that it would be impossible for someone to both find it and come down from the mountain. Even in present-day 2019, only the hardiest can make the climb up and down and survive. There are bodies left on the route sometimes for years. Even so, three different parties are attempting to reach Excalibur at the same time. Asparsia's Shadow sends a pair of nanovirus infected Navy Seals to climb up the mountain after flying in with a helicopter to the highest point possible and climbing the rest of the wait. Artad sends 3 of those who Watch to get Excalibur by hiring an experienced climb team. Turcotte gets to Everest using a bouncer but he still has to climb past a certain point, so he has an experienced medic mountain climber with him who prepared him with a transfusion of Oxygen-rich blood to acclimate him for the climbing area, plus Mualama is coming with him. It becomes a race to the finish, with the Navy Seals arriving at the top of the ridge first, because they put a claymore mine in Turcotte's group's path which kills the medic but not Turcotte or Mualama and sniper shooting all the members of the other team from Artad one by one. But Turcotte manages to kill one Navy Seal and attack the other who in a moment of clarity kills himself by jumping off the ridge, leaving Turcotte and Mualama as the only ones left. Turcotte uses his ice ax to free Excalibur from the ice cavern it was inside. As he reaches for it, he gets attacked by Mualama who is holding some form of blue stone which Turcotte realizes should not touch Excalibur. In the struggle to get Mualama away, Turcotte falls over the ridge and has to cut Mualama's arm to release his grasp of Turcotte. To his dismay, out of Mualama's mouth comes a three-fingered tentacle that tries to attach itself to Turcotte but he manages to reach hold of Excalibur and cuts and destroys the tentacle. Still holding Excalibur, Turcotte slumps to a sitting position on the ridge surrounded by dead bodies. While he was doing this Yakov had gained possession of the Master Guardian which was inside the other Mothership. As soon as Turcotte had gained possession of Excalibur, the Master Guardian turned off all other guardians, effectively eliminating the warring Aralias vantage advantage over humans. Quinn who had been monitoring events over the globe contacted Turcotte via his Satphone and told him they were sending in a rescue party to him.
While this was going on, Duncan had been kidnapped by a group who claimed to be the backup Majestic-12, set up 50 years ago, in case of problems. They tell her, that they need her to access her blocked memories, without telling her the reason. They are under the influence of the Swarm, the aliens the Airlia claim to be defending Earth from. Fortunate for all parties, this group of Swarm, has no means of space travel or space communication available to call in re-enforcements, yet. Duncan is the Key to all of this along with Turcotte.