“By Horus, stay!” Mortimer’s memories of the Great Pyramid are haunting him again. His nightmares start up again when he studies the strange radiation coming from Brussels’ Palace of Justice: a powerful magnetic field causing phenomena such as an aurora borealis, electrical failures, and frightful hallucinations to those exposed. The city is soon evacuated and surrounded by an imposing wall.
To overcome the radiation, the army has developed a plan that puts the future of the entire world at risk. For Blake and Mortimer, despite their long-standing quarrels and their age, this means an adventure to an abandoned Brussels in order to try once again to save the world. As it turns out, this unauthorized zone isn’t as abandoned as everyone thinks…