Oberon Wycherley never thought his dull London life could take a deadly turn-until a neighbour, American journalist Art Carew, claims to have uncovered an international conspiracy. A Greek industrialist is marked for assassination by a cabal called the Black Stone and that's only the beginning. When Carew is found dead in his flat, Oberon finds himself the prime suspect-and the only one who can stop the plot. Fleeing to the Scottish Highlands, Oberon must decipher Carew's notebook while dodging assassins and evading the police. Along the way, he forms an unlikely partnership with Syd Whatten, a man whose charm is matched only by his secrets. As the Black Stone's sinister plan accelerates, Oberon and Syd race against time to unmask the conspirators. Will they foil the plot in time? Or will Oberon become another casualty of a deadly game?