Former internal security director Stefan Prohosh has been demoted to director of a museum. He has stolen an experimental metal alloy and concealed it in a modern sculpture at his museum, and plans to sell it to a foreign power to get them to back his bid for power. The IMF must recover the metal and stop Prohosh. Rollin fakes an attempt on Prohosh and his call is interecepted by Barney, who sends Jim, Barney, and Willy. Jim reveals Cinnamon as Rollin's accomplice, and Prohosh is obliged to interrogate the two of them. This is a distraction that lets Barney and Willy secretly dismantle the sculpture, remove the alloy, and replace it with explosives. Jim slips a detonator into Prohosh's pocket and then detonates the explosive himself to make it look as if the chairman was responsible. No one is harmed in the ensuing blast but the chairman finds the detonator in the unwitting Prohosh's pocket and has him arrested.

Carl Vandaam, a bankrupt European tycoon, is masterminding the theft of plutonium to make a hydrogen bomb and sell to the highest bidder. To keep such a bomb from falling into the wrong hands the IMF must stop Vandaam. Jim and Cinnamon get close to Kura, one of the bidders, by offering to bankroll him in return for oil rights. Vandaam demonstrates the bomb's plutonium core but afterwards Barney manages to steal the plutonium and replace it with an empty cylinder. Vandaam's aide discovers the theft and seals the building while Vanddam bluffs it out hoping they catch the thief before the bidding is over. Kura wins the bidding unaware that Cinnamon has planted a device in his money. Cinnamon insists they see the plutonium again, Vandaam is forced to reveal the theft, and Kura wants a refund. Cinnamon destroys the money by remote control. Kura has Vandaam shot while the IMF escape and summon the authorities.