Wilma borrows money from a bank account and in order to get it back, she rents the Flintstones' house to some Swedish musicians without Fred's knowledge while they take a camping trip. When Fred drives a sleeping Wilma and Pebbles back home, he finds the Swedish musicians there and he and Barney attempts to get rid of them.

Because she needs to prepare for the surprise party for Fred's birthday, Wilma asks Barney to drive Fred around all day. Things don't exactly go as planned after the two of them fall asleep.

Ann-Margrock (special guest star Ann-Margret, providing her own voice) comes to town for a big concert and stays with the Flintstones, who do not know who she is. After a few tries Fred and Barney both get on the Ann-Margrock Show.