Luis Carpio, a 30-something virgin who, dejected after his girlfriend turns down his marriage proposal, heads off on holiday to Thailand with a bunch of friends. Once there, a peculiar chain of events ensues when Luis is mistaken for a famous Thai porn star, the “Big Bird” of the title.

This holiday special goes back in time to show how Elmo’s ancestors–not to mention those of Grover, Big Bird, Bert, Ernie, Oscar the Grouch and Cookie Monster–helped transform “the most unfriendly street in town” into the bright, kind, music-filled place it is today.