When the young Benjamin Kurrel turns 18, he inherits a box of ancient artefacts from his missing father. He gives an antique book to Slien, the girl he secretly has his eye on, and unintentionally sets a chain reaction in motion. An old man called Zeppos, who unlike Benjamin can't stand modern technology, is also very interested in the book which once belonged to the medieval scientist and cartographer Mercator. Using the secret messages in Mercator's book, the trio uncovers the mystery while having to stay one step ahead of a mysterious, shadowy rival as they cross paths with a centuries-old organisation that seeks the book.