The Case of the Drowned Pearl is a short or mini-mystery featuring the popular detective duo Daisy Wells and Hazel Wong from the Murder Most Unladylike series. The story is typically set in the 1930s, either at their boarding school, Deepdean, or during a holiday. In this particular case, the young detectives must solve a smaller, more contained mystery, likely involving the theft or disappearance of a valuable pearl that may have been deliberately hidden or lost in a water source. The mini-mystery allows the girls to showcase their signature investigation style—Daisy's dramatic flair and Hazel's careful observation and narration—giving readers a condensed taste of their clever deduction and friendship without the length of a full novel.