Red's mother Bernice has once again managed to make everyone miserable during one of her visits. While driving his grandmother home, Eric lashes out and tells her that it wouldn't kill her to be nice once in a while. Bernice promptly drops dead, leaving Eric to think he killed her. The entire Forman family (including Laurie and Red's brother Marty) comes together for her funeral while Eric gets drunk at a bar with the guys.

The gang goes skinny-dipping and Jackie gets sick. Hyde moves in with the Formans when his mom runs away with a trucker. Bob takes a liking to one of Midge's feminist friends.

Eric loves having Hyde as a "brother" because he does all of Eric's chores but when his parents start to prefer Hyde he starts to hate him. Hyde changes from the conspiracy minded trouble-making guy Eric loves to a total bore. Midge and Bob are having relationship problems. Red's old war buddy comes back and Red finds out that he's a swinger.

Eric, Donna, Kelso, Hyde and Fez are all going to Vanstock, Wisconsin's own Woodstock. Jackie says she doesn't want to go, so Kelso invites Laurie. In the end, both girls go leaving Kelso stuck in the middle. Donna gets mad at Eric for not telling her about Kelso and Laurie. Fez spends the night girl chatting to Jackie and Laurie, much to Kelso's chagrin while Hyde attempts drop him in it. Red becomes addicted to soaps.