Venice, Italy: Mimi has taken her grandchildren Avery, Ella, and Evan on a surprise trip to the Grand Canal in Venice… only the surprise is on Mimi! She does not realize that her special mystery writing suitcase containing her crucial-to-creativity mystery writing eyeglasses, monster coffee mug, and more – had been stolen! Alas, so has a special historical mask that she has been lent to wear to the famous Black & White Ball. Who will save the day? Well, Avery, Ella, and Evan are used to bailing their grandmother out of mystery messes… but this time? Well, they have their own problems: Kidnapped? Lost in the mysterious maze of side canals in the dark abroad a gondola… And the only way they can solve the mystery seems to depend on THE READER OF THIS BOOK! After all, unless YOU figure out the clues in graphical novel-and in the nick of time! – well, the kids and Mimi will be up the canal without a paddle, Mimi’s writing tools, THE MASK, and as Evan will readily tell you: “NO DINNER!