April 1980 and Jane is the first female detective to be posted to the Met's renowned Flying Squad, commonly known as the 'Sweeney'. Based at Rigg Approach in East London, they investigate armed robberies on banks, cash in transit and other business premises. Jane thinks her transfer is on merit and is surprised to discover she is actually part of a short term internal experiment, intended to have a calming influence on a team that likes to dub themselves...