Falling flower pots at Yale U. transform a professor and two students into King Tut, Lord Chancellor and Jester. Among other dastardly deeds, he plans the kidnapping of Lisa, the daughter of wealthy Andrew Carson who will appear as Cleopatra at an Egyptian-themed costume ball. Batman and Robin learn of Tut's return and of his plans to spirit away Lisa and subsequently do away with the two of them.
Watchful policemen at the ball mistake the Tut-garbed Mayor Zorty for the "real" villain, and consequently are absent when the foretold kidnapping ultimately takes place. Batman and Robin tail the large criminal to his hideout, but are captured. Robin struggles against his bonds as a casket containing an unconscious Batman is allowed to sink into a watery grave.