The Levels of Xarnia, The Final Chance

When Kai learns of his past that he has forgotten of he must make the hardest move in Xarnia. Leave it. While being in the code he can retrieve his friends and than bring them to the final level, which could be the most devastating one of them all. While all this is happening two suspicious characters watch from the real world. Who are these people? What are their aim? And what on Earth do they have to do with Xarnia?