The only men who can save Tartarus are now prisoners.The exotic underground world of Tartarus is collapsing, and only two scientists know how to reverse the portals that will allow the population to escape back to Earth. However, before they could complete their research, they were captured by the Army of the Ahmed Caliphate and taken to the city of Bab al-Jihad. Now, their only hope lies with their friends - an unlikely mix consisting of a martial...