Luka has been summoned to the most exciting city in the world, Prague and apprenticed to work for Emperor Rudolph II. The reclusive emperor collects wonders from around the world, all crammed into four rooms. Not everyone is charmed by his eccentricity though, and when a group of diplomats arrive, sent by the King of Span, Lukas senses danger. But if he is to protect the great Bohemian from tryanny Lukas must first learn the true meaning of trust, honour and friendship.