The year is 2007, and scientists have stumbled upon a parallel universe. A U.S. government probe sent through reveals an entire alien civilization on the other side, but a hostile creature cripples the device, spawning a black hole that threatens to unmake our own reality. To repair the probe and head off catastrophe, former Navy S.E.A.L. Cutter Slade is tasked with escorting three scientists across the divide.
Once there, Cutter is torn from his charges and taken in by the planet's natives, the Talan. Their homeworld of Adelpha has crises of its own: a figure called Faé Rhan is raising an army of Talans who believe themselves above their kin and intend to rule through force. Hailed as the Ulukai — a prophesied savior — Cutter is charged with recovering five sacred relics to bring Faé Rhan down, all while searching for the missing scientists and trying to save Earth in the bargain.