The young widow Lady Olympia Warlock is very famous in London for her unique gift - the ability to see, as if in reality, the location of missing people and objects. This time the young girl asks to find her missing brother, Brent Mallam, Earl of Fieldgate - the only one who can to save her from the hated marriage of convenience. However, seeing in her mind's eye the count, dejected, stunned by wine, in the company of predatory courtesans, Olympia understands that she herself must save him from the swamp in which he is stuck and call his sister to help. Thus begins the exciting a story of dangerous adventures, sophisticated intrigues - and, of course, passionate and all-consuming love...