Laura and Remington come to the rescue after Mildred inadvertently uncovers a bizarre plot involving a priceless diamond and a famous retired jewel thief.
A woman from Steele's past arranges for the agency to handle the security on an exhibition at an art museum, and contacts Steele with a desperate plea for help.
The reputation of the agency is at stake again when the gems that first brought them together are switched with fakes as Laura and Steele are transporting them.
When the investigators travel to the small California village of De Nada on a missing persons case, they get the feeling the whole town is hiding something from them.
Laura fears Reminton is enjoying himself a bit too much when a case calls for them to pull off a series of highly dangerous art thefts to thwart some crooks.
Remington is convinced someone is out to frame him while, when responding to a mysterious phone call, he accidentally hits and kills a man who has been blackmailing him.
Laura returns to Acapulco after a dying man leaves a tuna stuffed with diamonds and wrapped in an Acapulco newspaper on her doorstep. Steele joins her while trying to avoid a dogged IRS investigator, Mildred Krebs.
Laura returns to Acapulco after a dying man leaves a tuna stuffed with diamonds and wrapped in an Acapulco newspaper on her doorstep. Steele joins her while trying to avoid a dogged IRS investigator, Mildred Krebs.