Wally Bear's uncle, Gary Grizzly, has planned a party for Wally and the NO! Gang. At Wally's house, his parents tell him to go invite the rest of his friends to the party, and to reach his uncle Gary's house before dark. They give him parting advice to stay away from drugs.
Wally skateboards everywhere he goes in the game on his way to Gary Grizzly's house. The game is a side-scroller, and levels vary from suburban streets, subway cars, industrial areas, demon fortresses, and city streets. Along the way, Wally meets up with members of the NO! Gang, and converses with them about drug and alcohol use.
Upon reaching Uncle Gary Grizzly's house, Gary reveals that the rest of the NO! Gang has arrived ahead of Wally. Gary breaks the fourth wall, suggesting that Wally has brought a friend with him (meaning, the player of the game). The game ends with a cutscene of the party in progress, and Wally offers anti-drug advice to the player.