Lenoir was awakened in the year 2505 to a strange and confined world. All that remained of a decadent civilisation now existed inside an F-shell. This was an impenetrable shell of force that had now stood unopened for four hundred years. Fortunately, Lenoir's memories of his own past were quite vivid. Memories of blue skies. Memories of his wife Betty. Memories of his inventing the means to create and collapse F-shells. So the issues were simple. Help the rebel Durag and his daughter Liram to defeat the dictatorship of the Rufuses and Ruli Cardell, open up civilisation to freedom and progress, and he could use the time machine to return to the era where he felt he belonged. Or was it all quite that simple...?