The Big Bad Wolf is not interested in eating the pigs, but rather joining their band. His problem is that he is a terrible trumpeter and therefore fails to endear himself to the Bops (or the audience, all of whom refer to him as a "square"). Constantly thrown out of the clubs he visits, the insulted Wolf retaliates by using his trumpet to blast away the House of Straw and the Dew Drop Inn of sticks.
The club of bricks is where he runs into problems; wolves are not permitted in the club, but he is not the least bit discouraged. Like his forefather, the Wolf runs out of breath in trying to blow away the club. Unlike his forefather, however, the Wolf resorts to other measures to make his mark. He reenters in fur coat and ukulele with his rendition of the Charleston song (cut short by slipping on a strategically-placed banana peel). He returns in the disguise of a houseplant with his trumpet but gets blasted outside by a plunger shot from the double bass. For his third try, the Wolf shows up in drum major outfit playing a big bass drum. A dart is shot into the drum, leaving him to exit in humiliation.
Finally, he shows up with a large cylinder of TNT and snaps, "I'll show those pigs that I'm not stuck! If I can't blow it down, I'll blow it up!" The fuse is blown out on his first try, so he steps back a bit and lights it from there. Unfortunately, he is too far away and his weapon explodes while he's carrying it to his target.
The Bops hear his trumpeting from "the other place" (hell), and it has improved dramatically. One of pigs proudly replies, "The Big Bad Wolf, he learned the rule: you gotta get hot to play real cool!" Thus the Wolf achieves his goal in afterlife: becoming a member of the Bops.