Upon learning that The Gotham City Bank has been robbed by 2 invisible crooks, Commissioner Gordon attempts to contact The Dynamic Duo but is stopped by the invisible Cassandra Spellcraft, alias Dr. Cassandra, and her husband Cabala. After warning The Batman that they're helpless to stop them, they depart. While The Batman pays a visit to Gotham City Library where Barbara Gordon shows him some books on the occult sciences, Dr. Cassandra and Cabala return to their hideout where the good Dr. shows Cabala her deadly Alvino-ray gun and warns Gordon that she will now try to steal the famous Mope diamond from Spiffany's Jewelry Store. The Commissioner quickly informs The Dymanic Duo; joined by Batgirl, the trio converge upon the jewelry store just as Dr.Cassandra tries to swipe the valuable gem. Turning her Alvino-ray gun on the trio, she steals their dimension, flattening them, leaving her free to steal the Mope Diamond while Cabala collects the flattened heroes and delivers them to Police
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