Bill an ordinary young guy in his early 20's suddenly finds himself catapulted from the London of 1972 to the London of 2972, where he discovers his cousin has been fighting in a terrible war on a distant planet and that he has been seconded into that fight. Encountering an alien race called the Xon, inventors of the time travel machines, Bill learns that much of the Earth army is made up of soldiers declared missing or killed in action in wars both past and yet to come. The effects of the war and the travelling back and forth through time have a profound effect on Bill and his attitudes and outlook on life change him. having fallen in love with Kalera, one of the elegant Xon females at the Time Centre, Bill is torn between his life in 1972 and what could be in 2972...