Introducing a wonderful new heroine, judge and investigator Mara, who lived in 16th century Ireland. The Burren, on the western seaboard of Ireland, was a land of grey stone forts, fields of rich green grass and swirling mountain terraces. It was also home to an independent kingdom that lived peacefully by the ancient Brehon laws of their forebears. On the first eve of May, 1509, hundreds of people from the Burren climbed the gouged out limestone terraces of Mullaghmore Mountain to celebrate the great May Day festival, lighting a bonfire and singing and dancing through the night, then returning through the grey dawn to the safety of their homes.