Three jewel thieves try and find a way to smuggle some expensive diamonds from Hawaii to L.A. That is where Fred and Lamont come in. Fred goes to Hawaii to attend a Junkmen of America convention. The crooks then plan to sneak the jewels on Fred so that he can take them to L.A. without knowing anything about it.

The diamond thieves continue their plot to have Fred smuggle the stolen diamonds into the United States. Freddy Wells sneaks into Fred's hotel room and plants the diamonds in his suitcase. Later, Lamont and Fred discover the diamonds and hesitate to call the police.

During a mishap at the airport Fred accidentally misplaces the suitcase with the diamonds and the crooks start chasing Lamont and him all over Hawaii, trying to get them back. Meanwhile, the cops close on in, but not before guns are drawn on Fred and Lamont as the crooks trap them on a boat.