Assigned by Morgan Edge to write the story of Superman's ancestry, Clark Kent found he had an extremely difficult job... even though he himself is secretly the Man of Steel. With the aid of his cousin Supergirl, but also with the help of his Uncle Zor-El and Aunt Alura -plus his cousin Van-Zee- he's struggling to uncover as much of his family background as possible in the planet Rokyn, where the bottle-city of Kandor was enlarged, before it vanishes into another dimension.