It is December 2039, and the Harpers are gathering together to celebrate Christmas. With a 'greed gift exchange', a rival cousin and a Nativity play battle, there may not be too much room for peace and goodwill.

It's December 2039 and the Harpers gather together to celebrate Christmas. Thirty years in the future, the family's appearance may have changed somewhat but their love/hate relationships are still very much alive.

Ben is in now in his eighties, a little slower than he used to be but still as grumpy as ever and causing grief for Susan - who, thanks to "a little moisturiser", hasn't aged a bit. To say that Janey has gained a little weight is an understatement, as she now weighs in at a whopping 20 stone. Michael, meanwhile, is doing a very bad job of hiding his baldness with an unconvincing wig and, following a disastrous trip to the zoo, Roger is now merely a head in a glass dome.

Susan is put out by the fact that grandson Kenzo, now 38 years old, hasn't come to visit the family for Christmas Day. Ben is quick to point out that the Harpers have had some of the worst Christmases ever, and the family are reminded of some of their Christmas disasters.

Two years stand out in particular - back when they were all a lot younger, and Janey was a lot lighter, the usual arguments over presents were exacerbated by Susan's fun, new game - the Greed Gift Exchange. But, when Kenzo finally arrives, he points out that the year Uncle Richard came to stay was just as traumatic for him.