Theorizing absolute zero experimentation would slow the disease afflicting his wife NORA, MR. FREEZE™ and his beloved bride are accidentally thrust 16,000 years into the past. Seeking to return to their proper century, the frigid fiend attempts to recreate the unintentional circumstances of his time-manipulation experiment, callously unleashing a deadly new ice age upon the surrounding lands. ROBIN™, a brave young warrior from a neighboring tribe, pleads for aide from BATMAN™, the noble leader of the BAT-CLAN. Recognizing the existential threat to their peoples, BATMAN, ROBIN and the stoic BATGIRL™ forge an alliance to stop the criminal king of cold!