What a reading madness between two book covers! "Christopher, I have hidden a treasure for you. Read this carefully. Recognize the secret." This is the last message left by Benedict Blackthorn. However, Christopher does not know how to solve this secret. Although a treasure would come in handy, as he has very little money left. And a new danger looms: the plague has found its way to London. The panicked atmosphere is further fueled by a mysterious prophet who can predict exactly where the Black Death will strike next. In their quest for the truth, Christopher and his best friend Tom find themselves in the heart of a dark conspiracy.