When his parents send his rebellious, younger brother, Flip, for a visit, Roger needs his friends' help to find out why Flip behaves so irresponsibly and the two always seem to be at odds with each other.

Joanie starts spending much of her time with insecure new friend Mikki, who has recently come to Milwaukee to get a fresh start. A jealous Jenny learns that rumors had abounded at Mikki's old college that she had gotten pregnant and starts spreading the word. It isn't long before it is suggested that Fonzie is the father.