The boys are discouraged when they see yet another Terrance and Phillip rerun. Then a commercial is run for a live appearance that Terrance and Phillip are making in Denver on Thursday night. Kyle gets them their tickets and they are all excited about going until they find out that they will all be participating in the "Earth Day Brain Washing Festival" on Friday and must get ready for it the night before, So that they won't miss the performance, Kyle promises the organizers of the festival that they will get Terrance and Phillip to come and perform. At the show in Denver when Terrance and Phillip take the stage, Terrance is fat and Phillip is missing. When a fake Phillip takes the stage Stan decides they have to get to the bottom of this. Backstage they sneak into Terrance's room, courtesy of a "female groupie or random slut." Backstage they find out from Terrance that Phillip left the act to do more serious stuff. The boys ask Terrance that if they can get Phillip back, would he agree to do the show.
The "Earth Day Brain Washing Festival" organizers arranging the details for the festival when the boys come back to report that Terrance and Phillip have broken up. The organizers demand that the boys come through on their promise. So the boys travel to Toronto where Phillip is performing "Hamlet." The boys endure the show and then meet with Phillip after the show. Kyle tricks Phillip into coming. At rehearsal the two of them still aren't getting along.
Since Terrance and Phillip still are at odds with each other, when their appearance at the festival is scheduled to begin, the audience is treated to the documentary Terrance and Phillip: Behind the Blow. The documentary covers Terrance and Phillip's career from their first fart, to their eventually break-up. As the documentary is running, the boys are on the run from the festival organizers, who are hacking at their limbs, well Kenny's anyway.
Out in the festival audience, Terrance and Phillip are both watching the documentary and realizing what they once had. They decide to get back together and the "Earth Day Brain Washing Festival" and our boys are saved.
Kenny almost dies when the Earth Day organizers keep hacking his limbs off in their efforts to threaten the children.