When Commander Thomas Pitt is ordered to protect a young woman visiting London from Spain, he cannot see why this is a job for Special Branch. When she disappears in the dead of night from Angel Court, however, he is faced with a dangerous mystery. Sofia preached new, and some say blasphemous, religious ideals, and her life had been threatened. But Pitt senses there is some deeper and more dangerous reason for her kidnap -- if that is what it is. Three men are caught up in the hunt for Sofia -- her cousin, a banker for the Church of England; a popular and charismatic politician; and a journalist who seems determined to goad Pitt to the truth. Each seem to be hiding something, and as the search for answers stretches from London to Spain, Pitt knows that time is running out, and the nation's security could be at stake.