Synopsis: Batman, Robin (Jason Todd) and Wonder Woman visit the Fortress of Solitude for Superman's birthday. Anxious about buying appropriate gifts "for the man who has everything", their fears are replaced with weightier concerns when they discover a catatonic Superman under the control of Mongul.
The villain has trapped Superman's mind in pursuit of his fondest ambitions, rendering him complely subdued and vulnerable. While in this state we, Superman's greatest desire is revealed to the audience, but none of the other characters, to have lived as a normal husband and father on an un-exploded Krypton.
Moore and Gibbons spend a good deal of time painting a picture of a domesticated Kal-El with a still-living Jor-El, a wife and a son.
Meanwhile, Batman, Robin and Wonder Woman try, mostly unsuccessfully, to defeat Mongul and rescue Superman.
Eventually, though, it is Kal-El's own mental strength that allows him to turn away from the fantasy and come back to assist his friends before Mongul kills them all.
Notes: Includes a 1 page drawing of Superman by Dave Gibbons.