As we see from the opening scenes. The Blue Carbuncle has been associated with death.
The Countess of Morcar is staying in a hotel and her valuable jewel, the Blue Carbuncle has been stolen while she was out Christmas shopping. A workman with a criminal record has been arrested for the theft.
Holmes meanwhile is on a wild goose chase. The Commissioner approaches him with a goose and a hat. A man who was being pushed about by some ruffians dropped it and ran off with it.
Holmes has fun describing to Watson, the character of the man who possessed such a hat.
It later transpired that the goose contained the valuable jewel in its gullet.
Holmes and Watson now need to find out how it got there and free an innocent man. First they need to find out who the goose was actually destined to go to.
This story has a festive setting. How the two stories get to intertwine was very well done. It offers some good moments of character acting. Frank Middlemass, Frank Mills, Ken Campbell all get a chance to shine.