Regency England, August 1812. Sebastian's plans to escape the heat of London for a honeymoon
 are shattered when the murdered body of Hero's good friend, Gabrielle Tennyson, is discovered
 drifting in a battered boat at the site of a long-vanished castle known as Camlet Moat.
 A beautiful young antiquarian, Miss Tennyson had recently provoked an uproar with her 
controversial identification of the island as the location of Camelot. Missing and 
presumed also dead are Gabrielle's two young cousins, nine-year-old George and
 three-year-old Alfred.
Still struggling to define the nature of their new marriage, Sebastian and Hero
 find themselves occasionally working at cross-purposes as their investigation 
leads from London's medieval Inns of Court to its seedy back alleys, and from
 grand country homes to rural enclaves where ancient Celtic beliefs still hold
 sway. As he probes deeper, Sebastian also discovers dark secrets at the heart
 of the Tennyson family, and an enigmatic young French lieutenant with a dangerous,
 mysterious secret of his own.
Racing to unmask a ruthless killer and unravel the puzzle of the missing children,
 Sebastian and Hero soon find both their lives and their growing love for each other
 at risk as their investigation leads to Hero's father, who is also Sebastian's 
long-time nemesis... and to a tall, dark stranger who may hold the key to Sebastian's
 own parentage.
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