The top-secret synchrotron took accurate photos of the future---and what they showed was disaster, both for the girl who ran the machine and the world she worked for. Major Judgen, astronaut, had trained for a first flight through space. Now he was called on to put his ability into an untested flight across time. Was his Girlfriend's death a certainty---and did that same certainty also doom the rest of humanity? Or was there a way to snatch a double victory from the discoveries to be made on the day after the world came to an end?