Master thief Evan Robley has his eye on the crown jewels of a tiny country - and if he steals them, Queen Kathryn will have to abdicate. This emergency draws IADC agents Trevor and Prince to the Agency at a terrible hour, and then undercover to ferret out the thief. Trevor's attempt to lure Robley off the grounds so he might be arrested fails spectacularly. Finally, Wonder Woman persuades the Queen to accept help, and together they discover - that the jewels are already missing! Wonder Woman finds Robley easily enough, but even caught by her lasso he denies stealing the jewels. Wonder Woman must discover the truth before Queen Kathryn's reign ends and her tiny country falls into unfriendly hands.