In the 1970s and 80s, West Berlin was a geographical anomaly: a walled-off enclave of neon and concrete that felt like the end of the world. While the Cold War simmered at the borders, a different kind of war was being lost in the subway stations. The city became the heroin capital of Europe, a place where the American "War on Drugs" ideology met a generation of youth with no future.

The face of this crisis was forever captured in the story of Christiane F. and the "Kids from Bahnhof Zoo". This wasn't the glamorous, cocaine-dusted decadence of the 1920s; it was a gritty, unflinching reality of teenagers huddled in the public toilets of the Zoo Station, fueled by high-grade heroin that leaked into the city with terrifying ease.

How did so much heroin enter a city surrounded by one of the most fortified borders in history? The answer lies in the Transit Corridors. Smugglers exploited the official routes connecting West Germany to West Berlin. Because the East German guards were primarily focused on catching political dissidents and Western spies, narcotics often slipped through the cracks of the Iron Curtain completely unnoticed.

The heroin epidemic turned West Berlin into a global cautionary tale, influencing public health policies for decades to come. It was an era defined by a specific kind of urban despair, one that would eventually give way to the techno scene's aggressive, redemptive energy after the Wall fell.