Gargoyles in Hell? They're real!
Captured, jailed and used for arena combat and lab experimentation by magnificent living monsters from Earth's medieval past, the surviving members of the CalEx incursion team must figure out whether escape - or survival - is even possible down in the Underneath. These creatures have always been with us. Waiting for their chance to come back, topside... and reclaim the surface-world of Earth for their own.
