Doc is trying to revive a house plant (which he named "Lucinda") by telling it his life story.
Meanwhile, in Fraggle Rock, it's almost time for the Duet-a-Thon, and everyone has a partner except Wembley, who insists that Gobo perform with Uncle Matt instead. Cotterpin Doozer notices Wembley sobbing, and inspires him to keep trying to find a partner. Unfortunately, Boober decides to go with his girlfriend Tosh, ironically after telling Wembley he hates the Duet-a-Thon ("Let's just say I ... I can't resist a culinary reference.") Wembley wanders off and sings a lonely song, passing along the practicing duos as they sing and hug him (!). Cotterpin notices him again and feels bad for him. They talk with each other, and ultimately decide to perform with each other in the Duet-a-Thon. At first they have some trouble coming up with an idea for a song, until they decide to do one about "friendship stuff."
When Wembley tries to sign up for it, Gillis (the "Don Music" Fraggle) declines Cotterpin's admission to sing with Wembley, which upsets him. He breaks the bad news to Cotterpin as her Doozer friends are saying very mean things about Fraggles. He tries to convince her that Fraggles don't hate anyone, but she has a hard time believing it. Finally, at the Duet-a-Thon, Wembley makes a speech: he says that this event is supposed to be fun, but leaving someone out of it makes it a lot less fun. He says he won't sing if Cotterpin can't, and the other Fraggles start agreeing with him ("We won't sing! We won't sing!"). This devastates Gillis, who laments that the Duet-a-Thon will now have to be called off, until Wembley suggests that he let Cotterpin in. This time he thinks it's a great idea (sheesh).
Wembley and Cotterpin, both dressed in banana tree shirts, sing "We Are the Children of Tomorrow", later joined by the others, a la "We Are the World". Sprocket overhears the song, and so does Junior Gorg (who uses his rake as a guitar and mimics). Doc notices that "Lucinda" has grown extremely tall - all because of the song that Sprocket overheard and started singing along with! Says Doc, "There's something magical about music. There really is."