On a mission to circumnavigate the universe, the crew of the Eldorado discovers an entire hidden universe, separated from our universe by the speed of light, composed of temporal dimensions. Yet the astronauts, their overtaxed minds pushed beyond rational thought, are increasingly unable to study the very phenomena they were sent to discover. Then the fighting breaks out. Colleagues gun one another down, friends turn against friends, and in the irrational combat the ship itself is damaged. The mission itself is part of the structure of the cosmos; the end of time is both the cause and the effect of the relativistic journey. Human nature becomes part of the physics of spacetime, and whoever controls the Eldorado controls the fate of the universe.