Great girl gumshoe, Daisy Diamond, and her best friend, girl scientist, Sally Sosmart, are off on their second novel-length adventure. It all starts when the famous Rising Star Ruby goes on display at the Pinecrest Museum. Of course, Daisy doesn't like the setup one bit, and she fears that famous Ruby will soon be stolen. So Daisy, Sally, and Sally's cat, Mr. E, immediately rush to the Museum in the middle of a storm. And when that very storm soon sends them all to the basement, they emerge to find it was the perfect cover for the crime of their lives. For the Ruby is now missing and all clues indicate it was taken by one very clever crook. Then when the girls learn their beloved Museum Curator, Mrs. Marbles, may lose her job over the whole incident, they are determined to find the Ruby and uncover the culprit who stole it. Now the question is: Are Daisy and Sally and Mr. E smart enough to outsmart this criminal mastermind? Holy Cannoli