Bob is a very reserved and taciturn man. Very few, however, know his secret. Bob is a CIA agent. A holiday in Rome leads him to meet a charming Jewish girl with a doctorate in art and an elderly professor of British origin, an expert in esotericism. Bob and Sarah's quests intertwine in a thrilling thriller full of Roman and European history with the life of Ettore Roesler Franz, the nineteenth-century Roman painter famous for painting the collection of one hundred and twenty watercolours known as "Roma Sparita", whose greatness lies in its esoteric meanings discovered only in recent years by Francesco Roesler Franz, the author of this book.