What do an Internet scam, a conference for mystery writers, and "The Great Sausage Scandal" have in common? They're all connected to the latest adventure of Addy Zhuang, an employee of the real-life bank at 221B Baker Street tasked with answering all of the mail that mystery fans send to Sherlock Holmes.

In the sequel to Sherlock's Secretary, Addy, his true crime reporter girlfriend Zabel, and his friends Sanna and Jasper travel to Scotland in order to solve a missing persons case connected to a prop from the classic movie The Private Life of Sherlock Holmes. Pretty soon, Addy and his colleagues are embroiled in a murder mystery, and the main suspect is a nobleman obsessed with one goal: hunting the Loch Ness monster!