In 1771, Robert Burns, future national poet and folk hero of Scotland, has big problems. 12-year-old Rab spends all of his time doing backbreaking work on his family's farm instead of attending school, but when he finds a hag stone in one of the fields, everything changes. Looking through its circular hole, he sees witches gathering in a coming storm, and they've set their sights on his family. Can Rab save his sisters from the clutches of the witches' coven before their Halloween ceremony in the old kirk? Filled with mystery and magic, Hag Storm is a spooky, historical adventure with a supernatural twist, based on the life of Robert Burns and one of his most famous and best-loved poems, Tam O'Shanter.