The Marnsburg Crown Jewels were brought to the U.S. and stolen from an armored truck. Jena Cole is known to be the thief, but the authorities have no lead on the location of the jewels. The IMF must recover the jewels before the hostile Marnsburg government makes a case out of it. Jena is to turn the jewels over to the Syndicate, which financed the theft, once they pay the last $2 million. Barney manages to get close to Jena and she finds he has plans to the Marnsburg Consulate. Meanwhile, the IMF deliver the "real" jewels to the consulate, claiming the first ones were fake. Jena finds out because she has a confederate in the embassy security and confirms that her jewels are fake through her diamond fence (a IMF replacement). Jena insists that Barney become her partner and steal the "real" jewels, which he can do because of electronic assistance that Willy placed in the embassy vault when he delivered the jewels. Barney plans to turn the jewels over to Jim his hard nosed creditor, so Jena substitutes her supposedly fake gems for the "real" ones. The Syndicate shows up and figures out which gems are which, and the police take everyone, including Jena, into custody.