Fred's mother-in-law is visiting the Flintstones. When she threatens to make it a permanent arrangement, Fred is desperate to find someone for the widow to marry so that he can have his home back. He finds a likely match for her in a Texarock millionaire who suits the mother-in-law's fancy. But then Fred hears a rumor that there's a fake millionaire about who's fleecing unsuspecting widows.

After Fred thinks he's been singled out for not receiving his annual raise, he mails his boss, Mr. Slate, a virulent letter. But then Slate visits the Flintstone residence to personally apologize for the inadvertent error and announces to Wilma that Fred is, indeed, getting his raise. Wilma, as usual, comes to her husband's aid and very narrowly prevents what surely would have been the end of Fred's career in the gravel pit. Herb Vigran guest-stars as the policeman.

After Fred's old friend Sherman extends an invitation to visit his hotel/casino, the Flintstones and the Rubbles head off to Rock Vegas. But before they even get the chance to check in, Fred has already gambled all of the foursome's money away. But Sherman invites them to stay on at the hotel by working off their charges.