Glasgow holds a music festival " The Big Day. The problem? You and your pals cant see it, because youre in a holding cell. The Girls have been best pals for ages. But recently, changes drive them apart. The girls watch Sheena, but when she debuts an American accent, Fiona throws a glow stick at the stage and the group is arrested. They meet Louise who was thrown in the cell earlier. The forced proximity allows the group to open up, help each other face their dilemmas and hatch an escape plan.
