1980s Thatcher’s Britain: a period of passionate political protest; feminist activism at its zaniest, where anything might happen and usually does.

Sheffield: the ‘People’s Republic of South Yorkshire’ and 'Lesbian Capital of the North'.

Three mechanics (Carol, Bev and Terry), unable to get work, set up their own garage in a run-down area of the city, naming it after Gwenda Stewart, a pioneering racing driver, employing an apprentice, affectionally called Dipstick.

The government imposes a new law, Section 28, preventing the ‘promotion’ of homosexuality by local authorities and schools. The mechanics campaign against it, joined by Feona, a teacher, regular Gwenda’s customer, and newbie to both Sheffield and to feminism. There are life-changing consequences for the women and their families.

This is a call to arms, fired by fun, friendship, above all an affirming belief in the power of collective action.