After three seasons of Kath & Kim (2002–2004), Gina Riley and Jane Turner initially planned to take 2005 off from television.
Kel and Kath return from The Da Vinci Code European tour and begin frantic preparations for Christmas.
During the two weeks leading up to Christmas Day Kim discovers that Brett is once again having an affair, this time with his boss Kelly.
Kath and Kel become backup dancers for Michael Bublé at Carols by Candlelight, Melbourne.
Kath and Kel also receive strange messages from John Monk (Barry Humphries), the albino running Da Vinci Code tour, including one saying "44 Euros".