Agnes Brown is determined to prove she's the essence of festive spirit after she's accused of "always" being cranky during Yuletide - but will she succeed? Christmas Week may not be the best time of year to undergo a personality change but the matron of the Brown family is undeterred and goes on a charm offensive. With her daughter trying to save the world, Granddad getting a little too close with oversexed neighbour Birdy and an escaped convict mistaken for a lodger that leads to a mass hostage situation, well...perhaps Agnes has bitten off more than she can chew. Of course, it's Dermot and Buster who save the day.