Professor Leigh Marie Evans and her archaeological research team have discovered a mysterious black door within a cave deep underground in the barren, mountainous deserts of Chad.

Alex Barker, a 4th grade teacher and soon to be father, goes out to get his pregnant wife's dinner and has an encounter that will forever change his life.

U.S. Marine Corps veteran Bennett Hunter is on the run following a violent assault against a prostitute. With seemingly no way out, he tries to find solace before his arrest, but is instead approached by a mysterious stranger.

Izaiah Ezekial, a man older than civilization, stands ready to recieve the two human delegates and deliver the news that they are not only technically dead, but now at the mercy of the powers of the afterlife.

The dig crew in Africa finally manage to open the onyx door at the top of the Dead Stairs and explore the mysterious reaches beyond.

Abandoned by Izaiah in an African desert, Alex and Bennett decide to take matters into their own hands and venture out to find help, soon realizing they probably should have just listened and stayed put.

Captured by the Wraithian cult, Alex and Bennett come face to face with an enigmatic man in a white mask who sheds some unwanted light on their situation.

Following hours of agonizing torture—and yet somehow still alive—Alex and Bennett meet yet another creature from UnEarth and beg for their help.