In the 1980s, Liverpool's fortunes plummeted. Docks shut, jobs vanished and neighbourhoods erupted into riots. Into this fractious world stepped a group of hard-left politicians that would be celebrated and vilified in turn - Militant.Three and a half decades on, Militant is still a loaded word in British politics. In Liverpool, many families will never forgive them. But for others, they were heroes.This is the story of how a secretive group of left-wingers captured power in one of Britain's great cities, and took on Margaret Thatcher. It's about what happens when you try to put your ideals into practice - and how it can go spectacularly wrong. It involves skulduggery, taxis and a case of missing orchids.This is the story of the most controversial group in British politics. It's the story of Militant in Liverpool.