Lucien Mulholland, a teenager recovering from chemotherapy, is given a red and purple marbled notebook by his father so that Lucien can write in it since Lucien's throat hurts. When he falls asleep holding the book, he wakes up in the enchanting Bellezza, a Renaissance Venice-like city in the country of Talia (which resembles Renaissance Italy), ruled by a beautiful and imperious Duchessa. Here he meets the adventurous Arianna Gasparini and the mysterious Rodolfo Rossi. Rodolfo is a Stravagante, a traveler of a secret order who can move between Lucien's world and Rodolfo's by use of a talisman (an object from the other's world). However, Bellezza for all its beauty also has many dangers, especially for those who become close to the Duchessa.