Your favourite young detective returns with a new mystery in hand in the fourth installment of the Sherlock Hong series. Sherlock is given the task of helping his tutor Miss Priya translate a classic swordfighting manual called The Sword of Lady Yue. Written by a great swordswoman from the State of Yue in China more than 2500 years ago, a sponsor in London expresses interest to publish the manual in English. But both Miss Priya and the precious manual go missing! Sherlock is certain that an old enemy of his has kidnapped his tutor. Can he prove that Miss Priya's disappearance along with the manual is no coincidence? Will he be able to figure out the clues?