William Mandela is a genetic throwback, one of the small group of
humans who fought and survived the Forever War. They returned to find
humanity has evolved into a group mind called Man. Surrounded by a
society that is too autocratic and intrusive, living a dull existence
which cannot compare to the certainties of combat and feeling
increasingly alienated, the veterans plan an escape to the future by
means of space travel and relativity. But when their ship starts to
fail, their journey becomes a search for the Unknown, the elusive
entity responsible.