Mr. Freeze, thought to have perished, has returned and is seeking revenge on Batman. The villain is committing crimes involving diamonds, or "ice," in one form or another. He freezes Batman and Robin, who look like goners.

Vince, a temperamental physician at a Gotham City hospital (apparently a takeoff on Ben Casey), saves Batman and Robin. The Dynamic Duo resume their pursuit of Mr. Freeze. Eventually, Batman substitutes himself for Paul Diamonte, a baseball player, Mr. Freeze has kidnapped. Robin, disobeying Batman's orders to stay away, is also captured by the villain. Now, in his headquarters, Mr. Freeze is using his climate controls so that only Batman or Robin will have access to life-giving warmth.