Jealous piano teacher Orville Spooner sends his beautiful wife, Zelda, away for the night while he tries to sell a song to famous nightclub singer Dino, who is stranded in town.
In Paris, a former policeman falls in love with a prostitute, and tries to get her out of that life by paying for all of her time.
A crooked lawyer persuades his brother-in-law to feign a serious injury.
When a bored Holmes eagerly takes the case of Gabrielle Valladon after an attempt on her life, the search for her missing husband leads to Loch Ness and the legendary monster.