When $60 million worth of stolen diamonds destined for a relief charity end up in the hands of casino owner Jack Catlin, MacGyver must head to the Virgin Islands to try and get them back. With the help of Chris Rhodes, a senator's daughter, MacGyver masterminds a plan to break into Catlin's vault and steal them back.

We pick up the action mere moments after the close of the previous episode, as the airmen-filled cow narrowly escape being milked by a German patrol while awaiting the landing of the plane. As they watch disappointedly, the plane does not land, instead jettisoning two parachutes, one of which yields a new escape package. The other yields Officer Crabtree, sent from 'British Ontelligence Headquitters' - disguised a policeman, he is supposed to blend in. Unfortunately, his French is abominable, getting the vowels wrong as often as not...
Meanwhile, the plan to blow up the non-painting-filled knockwurst on its way to Hitler has hit a snag - Rene can't find anyone to blow up the train.