The teens once again find themselves in the bunker of The Hollow. It quickly becomes clear that something is different this time, because Adam and Mira still have their memories and something's wrong with Kai from the start. With new and old dangers and Kai acting increasingly strange the further they go, can the team make it all the way to the end?

The Hollow is over- but as Kai continues to see visual glitches and Adam begins having strange dreams about the game that leave him sleepless, that may not be the case after all. Is it for real? Some unforseen side effect of the Hollow's level of virtual tech? Or is it something... else? And most importantly- will it make or break the trio?