At the dawning of the Middle Ages, Thorston, an old alchemist, works feverishly to create gold and to dose himself with a concoction that will enable him to live forever. The key to his success lies in a mysterious book with blank pages that can only be read by desperate, green-eyed people. Brother Wilfrid, a priest with green eyes, knows the dangers of the book and seeks to retrieve it. An intriguing tale in which goodness ultimately triumphs.