The legendary gold of Montezuma did not disappear into the depths of the sea? This conclusion is clear from Antonio de’ Medici’s letter to his nephew, Grand Duke Cosimo. But... where to look for the mysterious treasure? Lola Sanchez, a specialist in ancient manuscripts and the owner of a used bookstore, has no doubt that will be able to decipher the code indicated in the letter, find four clues and find a treasure that disappeared several centuries ago. However, the journey can be dangerous - because each key is still guarded by clever and insidious traps that can cost the life of even the most experienced treasure hunter...