2651: Humans have colonised most of the Solar System, and have a vast theoretical knowledge of the multiverse. The Martian Branch of the Earth History Institute decides to put that knowledge to use by offering a few lucky students the chance to spend a short while on a different point of the spacetime continuum for research purposes. Samir, a young Terran, takes this opportunity to experience London in the `90. A few years later he happens upon another time traveller, Beatrice, a young Progressive (human from the outer planetary systems). They fall in love, but for their story to work out, they have to overcome their own prejudice and change their expectations from life.