Grandma is impulsive, bossy and badly dressed, with a passion for brightly coloured cowboy boots. She gets the wrong end of any stick and stumbles unwittingly into magical adventures. Her cynical sidekick, Gertrude the cat, gets dragged into all of Grandma's scrapes whether she likes it or not. In this snowy adventure Grandma mistakes Santa for a burglar and is taken, along with Gertrude, on a thrilling airborne ride. Grandma's dreadful jokes are no match for the jolly-faced man, who somehow knows all the answers. How does he do it? The penny finally drops when Grandma realises that horses don't have antlers. Gertrude is very brave when she is sent on a daring mission by Father Christmas, and succeeds in a very special delivery for a little girl. Gertrude and Grandma find a wonderful surprise awaiting them when they get home. But how did that happen?