Bill and Ted's Nail World boss, Mr. Keilson, accidentally uses their time traveling phone booth, ending up in King Arthur's England and inadvertently replacing Arthur as king.

Bill's attractive young ditsy stepmother Missy is shocked to learn that the hero of a daytime soap opera she has a crush on wants to have a sex change operation, so the boys enter the show to change his mind, messing up the plot further.

In order to make their disillusioned music appreciation teacher feel better, Bill and Ted go back in time to 1969 when she and Ted's army father, who turns out to have been a hippie at the time, were on their way to Woodstock.