Thanks to John L. Cyborg's invention of a functional time machine, Ice Cream Truck traveled back in history with the intention of joining in the December 1969 free concert at Catamite Speedway in Northern California. The planned lineup of bands included Santuna, playing their popular brand of fishing music, Norwegian radio kings Jorgensen Airplay, Conjunto superstars The Frying Burrito Lovers, food aficionados CSNY (short for the Crassly Still Noshing Young), Ice Cream Truck, psychedelic yuppies The Perturbed Living, and notoriously quarrelsome Jewish family rock band, The Roiling Steins. Unfortunately, there were several incidents of violence and the Truck never performed as planned.

That day, the Truck were introduced to all the bands, including The Perturbed Living, a yuppie band whose disinterested yet trend-conscious followers were known as LeadHeads, and also as complete douchebags. The Living had a group of fans who were in a sort of car club and who would routinely provide security and free soft-serve at their concerts. The organizers of the festival at Catamite thought that it might be a good idea to ask the car club — known on the mean streets of New Jersey as "Mister Softee" — to do security there as well, and this would have been fine had Ice Cream Truck not arrived when they did.

The Mister Softee gang was notorious for their overindulgence in sweets, often leading to severe bouts of hyperglycemia, and manifesting as frequent hunger, thirst, and excessive urination. As the day wore on, the Softee bunch became more and more aggressive, finally giving Cyborg's boots and pant legs a golden shower just before the Truck were about to take the stage.

While Cyborg attempted to remain calm, Turgledge, in typically sardonic and juvenile fashion, pointed at the Softee members' members and remarked that their ice cream wasn't the only thing that stayed soft. This precipitated an all-out brawl between the Truck, their entourage, and the Softee gang. Eventually, some concertgoers also got dragged into the melee.

At this point, The Living were very perturbed and refused to play at all. To quell the disturbance, headliners The Roiling Steins were asked to take the stage. They did so, but argued for several hours about what song to start with, the correct tempo, the right key, and who would take solos in what order.

It was reported that until the ice cream started flying, the Steins weren't even aware that there was a brawl going on. When one of the Steins attempted to end the concert and leave the stage, Softee gang leader "Sweet Tooth" McDervish ordered him back on stage, saying without a hint of irony, "Get back up there and play. I'd better hear some Hava Nagila or everyone's gonna take it in the ass at Catamite!"

Eventually the Softee's sugar rush went away and they lost the energy to continue the fight. Ice Cream Truck made a mad dash for Cyborg's time machine, returning to the future while the Steins finished their set. Even with the concert over, many of the LeadHeads were still in the concession area arguing over whether a central valley Merlot was really a better bargain than an Australian one, although they did all agree that San Francisco was the greatest city anywhere ever.