June's mission was successful, but at what cost?
A year after destroying the wormhole generator in France and thus blocking the way to Earth for an allied AI, she lives with AcesAzrael in Switzerland. She fights alongside the last free humans against the approaching Forum and its unstoppable troops.
There is still no trace of Janika, but when the Swiss make a dangerous plan shortly before their final defeat, there is only one hope for June and Ace: to find Janika and uncover the secret of a new, mysterious place in the metaworld.
The Black Fortress is a phenomenon you can find your way into, but never out of. It is the only way out for the future of mankind and at the same time could be its downfall...