England, XIII century. The sworn enemy of King Edward I, Simon de Montfort, was killed, his followers were executed, but London is still not calm, as if something evil is afoot here. But can the shadows of those killed return to avenge themselves? What is this strange sect that calls itself “Pentagram”? What kind of corpse was found in the center of St. Mary-le-Bow, and is it true that satanic rites are performed in its ancient crypt? Hugh Corbett, an official of the Royal Chancellery, does not yet know what terrible path he stepped on when he decided to seek answers to the questions of his sovereign.