Once a slag, always a slag? It’s the 1990s. Sarah is 15, obsessed with sex, getting drunk on Malibu, and her teacher, Mr Keaveney.

Fast forward: Sarah is 41, the last of the party girls. But the mad nights out are losing their shine. Craving adventure, she sets off with her sister Juliette on a whisky-fuelled campervan trip across Scotland.

They know all the dark corners of each other’s history – and it’s time to dig up some demons, kicking and screaming. Because the things that once defined us shouldn’t define us forever… should they?