Twelve-year-old Florian Bates has just moved to Washington, DC, the latest of places he's lived for his dad's job a security specialist and his mom's an art conservator--now with the National Gallery of Art. Florian keeps busy developing his technique TOAST (Theory of All Small Things) that focuses on details to solve life's little mysteries such as where to sit on the on the first day of school or which Chinese restaurant has the best eggrolls.

His observational skills haven't earned him many friends in the past, but his neighbor Margaret turns out to be a kindred spirit and an excellent student of TOAST. While testing their talents in the National Gallery, they uncover a valuable lead about a piece of stolen art! After calling in their tip, Florian and Margaret catch the attention of the FBI...and a notorious crime syndicate known as EEL.

Now, Florian is the only kid on the FBI Director's speed dial and several international criminals' most wanted lists, and he and Margaret might be in way over their heads. Can these amateur sleuths foil an art theft and forgery ring by looking at the small things, or will they find the devil is in the details?