“May the fire of knowledge illuminate the dark secret of the plague,” the young doctor Vitus could not have better formulated the purpose for which he and his friends set out on a dangerous journey. And so, on an October day in 1579, in the library of the University of Padua, they managed to find an encrypted and hidden message from Francesco Petrarch himself, which began with these words... The mission of the traveling surgeon is completed, and he is ready to return to England, but in his native monastery another evidence from the past awaits him , which can shed light on the mystery of the origin of the last representative of the Collincourt family.