As head of the Gestapo in Lyon, Klaus Barbie personally tortured prisoners and oversaw the deaths of thousands of people. After the war, he was co-opted by the American Counter Intelligence Corps, who protected him in return for information. When he finally slipped away to Argentina, the Americans looked the other way. But back in France, Nazi hunters Serge and Beate Klarsfeld were determined Barbie should be found and brought to trial. When a photograph emerged suggesting Barbie was alive and well in Bolivia, they began a mission that would last over a decade and involve a race-against-time pursuit to the border of Peru, a failed kidnap attempt, shady international deals and, finally, a cloak and dagger night flight to France where the notorious butcher was eventually brought to account. He was sentenced to life imprisonment in 1987.