As Ireland prepares to celebrate its first public holiday dedicated to a woman, Derry Girls star Siobhán McSweeney goes in search of the real St Brigid. Fifteen hundred years after the saint's death, Siobhán unravels the tangled threads of fact and folklore surrounding her, and asks why, in an increasingly secular and diverse Ireland, Brigid's popularity appears to be on the rise. She also meets Herstory activist Melanie Lynch and poet Laura Murphy, who reveal the motivation behind the Herstory campaign and their mission to make St Brigid's day a national holiday.