The Eldorado has a single mission--to circumnavigate the universe. It is the first manned spacecraft to achieve relativistic velocity. The seven crew members have accepted that theirs is a voyage to the very end of the universe.              But they did not anticipate all of the strange effects of relativity. And when reality becomes distorted, when dreams become reality, when the past comes into question and the future becomes a singularity toward which the ship irrevocably hurtles, the fate of the entire universe hangs in the balance.