Fred and Wilma's marriage is in serious jeopardy, as Wilma is growing tired of Fred's attitude, especially while Barney and Betty are enjoying a happy life well into their marriage, to the point that a visit to a family therapist results in a physical altercation between Fred and Wilma. On Fred and Wilma's anniversary, which they both forgot, the Rubbles arrange a trip to Rockapulco in an attempt to save the Flintstones' marriage.