The traitorous life and work of a dispirited MI6 spy and long-time KGB mole begin to unravel as he comes under increased scrutiny in 1960s Montevideo. At the center of the intrigue are two Cold War intelligence officers assigned to Uruguay, a middle-aged British MI6 officer, and the Soviet KGB Rezident. The intricate chilling details of the eventual betrayal of the MI6 spy, as his life and work suddenly unravel, ends climactically in faraway Moscow.