Did the 'dirty war' between the terrorists and the Argentine military dictatorship ever really end after the Malvinas war or have its protagonists re-emerged in new, and dangerous guises in today's Argentina? Into a sinister world in which sex, crime and espionage overlap, Malvinas veteran and ex-banker Leandro Flemming, led on by Sam, his sexually audacious mistress, are drawn in pursuit of the murderer of an English polo "groupie" in a Buenos Aires boutique hotel In the process, they uncover a bizarre relationship between interrogators and victims, born in the dark cells of the ESMA interrogation centre, blossoming, like some black orchid, more than 20 years later on the shores of Lake Zurich. From the warmth and charms of Argentina's old-world capital city to the deviant strata which lies below the surface of Switzerland's financial centre, their investigation leads them into a milieu of erotic extremism, severely testing their own relationship.