Isaac Asimov opens the novels with an introduction to the evolutionary possibility that robots and advanced A.I. may one day, in an effort to better understand the humans that they serve, develop a sense of humor and, as a result, the ability to think creatively. Derec, Arielle, Mandelbrot (formerly Alpha, undergoing the name change after a shift in its positronic brain), and Wolruf are still no closer to escaping Robot City after helping to restore Jeff’s body and fixing the escape pod that Mandelbrot and Wolruf arrived on for his escape. As Robot City continues to grow into a bustling metropolis and hopeful utopia for future human inhabitants, Derec becomes intrigued with an almost infectious evolution in the way more advanced humanoid robots, namely supervisors and designers, think. Derec and the team investigate an amazing, newly constructed, building created by an artistic visionary robot, named Lucius. On the way the team notice that humanoid robots have developed a drive to seek deeper comprehension when they come across three robots named, M334, Benny, and Harry, that have banded in an attempt to understand the phenomenon of music. The three robots form the band, The Three Cracked Cheeks, a 1940’s Jazz revival as they participate in a theatrical rendition of William Shakespeare’s, “Hamlet”, in an attempt to weed out the suspect responsible for the murder of Lucius.
Meanwhile, after the play, Dr. Avery, the designer and mastermind behind Robot City, returns to his experimental world of robots. Using advanced hunter robots, the megalomanic and eccentric, Dr. Avery, apprehends the team who he believes responsible for the odd behavior taking over city’s robots. The team subsequently escape Robot City by commandeering Dr. Avery’s small star seeker spacecraft.