Clay wakes one day to find himself plunged aeons into the future — countless millions of years after his own primitive, strife-torn 'twentieth century'. The sons of Man are now highly developed. They can change sex at will and are beautiful in form. They instruct Clay in their ways of life and entertain him lavishly and luxuriously... But there is one thing of which they are ignorant. Something only Clay can teach them. Something that his own time was very good at... Death.