Olga Robards (1989)

Devoted to perfection, stone-faced Olga Robards, a highly efficient contract killer, arrives in Athens, Greece. Now, her high-profile targets are as good as dead. However, even experts make mistakes, and as a spate of grisly assassinations terrorises the city, a momentary lapse of concentration blows Olga's cover. As a result, intrigued by the elusive, pitiless hitwoman in the shadows, an unseen young witness enlists the help of the "Scientist", a streetwise recluse escaping justice, to meet in person the impeccably dressed executioner with the unsmiling face. But do they know they are playing with fire?