The year is 1666. The Purple Ring, a clandestine gang of scoundrels, is plotting to accuse the Jewish people of Pulichev of high treason. The count’s granaries are burned under cover of darkness. An apostate priest meets with a sinister figure among the gravestones in the churchyard. A Turkish spy is captured, but before he can be interrogated, he dies under suspicious circumstances. Assassins penetrate Bernowiecz Castle when they learn that a Polish national hero will be spending the night there. Plots within plots are hatched under dark midnight skies. And time is running out.