Triangular Doorways

As part of an experiment, George, an American fighter pilot, discovers Atlantis in an alternate universe. He finds himself imprisoned in a pyramid and escapes to find unthinkable horrors from an alien race. Luckily, he gains the help of Oliver, an alien ally, and together they discover an even greater danger-a plot to destroy and enslave all mankind. Meanwhile, the Earth itself is in imminent danger due to its impending rendezvous with the center of the Milky Way Galaxy via the galactic alignment, an event that occurs once every twenty-six thousand years. With time running out, it's a race to save all humanity from a ruthless alien bound on our destruction and to save the planet.