A girl goes missing in the heart of London. A mutilated body is pulled from the Thames. A mysterious house hides dark secrets, protected by the greatest power in the land. When her daughter Katie vanishes just a few days after arriving in London, Winifred Wren immediately heads to the city. Frantic with worry, she quickly finds herself stonewalled. Katie's apartment appears to have been ransacked, with strange symbols daubed all over the walls, but...