A classic tale. A fanatical man. A desperate detective.

Christmas is only a few weeks away at 221b Baker Street! As Irene sets up the decorations, a jovial man name Mr. Dearborn asks for her assistance with a strange request. He's purchased the famous Baskerville Hall - the one from her uncle's story - and he is determined to have Irene and Joe assure him that there is not, in fact, a giant hound that roams the grounds. She refuses at first until he hands over a sum of money unlike Irene has ever seen.

Once Irene and Joe arrive at Baskerville hall, not all is what it seems. Dearborn confesses he is a fanatic of the Sherlock Holmes stories and demands to know more about the elusive detective now that he has his daughter in his grasp. He also surprises Irene and Joe - and the other guests he failed to mention - with a re-enactment of the story of the Hound of the Baskervilles, with the pair taking centre stage. Now in the middle of the most well-known Sherlock Holmes story of them all, Irene and Joe must outsmart, and out fight a man who thinks he knows more about Sherlock than they do.