Dmitri Polyakov rose through Soviet military intelligence to the rank of general while secretly spying for the CIA and FBI for over two decades, handing American handlers details on Soviet nuclear strategy, troop deployments, and the GRU's own tradecraft. The film traces his path from a decorated GRU officer stationed in New York to one of the most valuable double agents of the Cold War, using archival photographs, declassified documents, and historian interviews to reconstruct how he operated undetected inside Moscow's military establishment for so long. It lays out the endgame in detail: Polyakov was eventually betrayed not by chance but by two American traitors, Aldrich Ames and Robert Hanssen, both working for the KGB, whose leaks led to his arrest and execution. The documentary weighs why intelligence historians consider him arguably the most damaging loss the Soviet system ever suffered to Western espionage, and follows the parallel story of the moles who brought him down, making the case that his fate is inseparable from the larger Ames and Hanssen scandals that shook American counterintelligence.