It's Gene's retirement day: he is turning sixty-five and it's time for a new body. Nothing is more important to him than the next time.As he prepares for the process, the city is invaded by armor-clad alien invaders. Gene gets to the clinic, but when he comes to as a young man the situation takes a turn for the worse: the invaders are murdering young people only.A planet-wide evacuation is announced and Gene fights tooth and nail to get a seat on the first ship to leave Earth—but at what cost? Will it be his last next time?