Chief O'Hara has been drugged into a love-slave of Marsha, Queen of Diamonds, allowing her to rob U. Magnum's of the famous Pretzel Diamond. Gordon puts through a call to The Dynamic Duo on The Red Phone to alert them of the chief's off-kilter behavior, sending them to Police HQ. Meanwhile, The Diamond Queen has O'hara phone Gordon, who rushes to Marsha's hideout to resuce the chief and apprehend the diamond diva, but, thanks to a dart fired from a statue of Daniel Cupid tipped with a love potion concocted by Marsha's Aunt Hilda (a winsome witch who was a chemistry professor at Vassar for 20 years before being thrown out for turning the entire student body orange for a week!), the commissioner is added to Marsha's unending list of love slaves. Under Marsha's spell, Gordon phones The Caped Crusader and lures him into a trap at her lair!

The Dynamic Duo speed to Marsha's love-nest/hideout, where the criminal Queen Of Diamonds shoots a love-potion-tipped arrow at Batman, but The Caped Crusader uses every fiber of his superior Bat-will to fight off the powerful drug. Enraged by this insufferable effrontery, Marsha orders The Grand Mogul her Guardians to destroy Batman and Robin and, in the fray, Robin is both drugged and captured. Marsha offers to trade the Boy Wonder for huge batdiamond that powers The Batcomputer in The Batcave. Batman demurs, saying that no stranger can enter the Batcave; Marsha bounds over this hurdle by offering Batman her hand in marriage. This way, she will no longer be a stranger, she will become Mrs. Batman!! The next time we see Batman, he walks down the aisle with Marsha toward the church altar!