The year is 1998, the world is a growing nightmare of desperation, of uncontrollable pollution and increasing social unrest. In Cambridge, two scientists experiment with tachyons - subatomic particles that travel faster than the speed of light and, therefore, according to the Theory of Relativity, may move backwards in time. Their plan is to signal a warning to the previous generation. In 1962, a young Californian scientist, Gordon Bernstein, finds his experiments are being spoiled…