When Benjamin, a digital native, turns 18, he is given an ancient artefact box from his missing father. He gives it to Slien, the girl he has his eye on, and unintentionally sets off a chain reaction. An old man named Zeppos is also very interested in the book that once belonged to the cartographer Mercator. Using secret messages found in Mercator's book, the trio uncovers the mystery while having to stay one step ahead of a mysterious rival.