Slingshot is the spirited tale of overlooked Highland woman Kath who works in the ticket booth of a Scottish castle. On the day of her local village’s Pict vs. Viking battle re-enactment she longs to join in but is thwarted by her annoying boss Gordon. Worse still, she has another run in with teenage daughter Emily. Kath’s world unexpectedly changes when enigmatic tour guide Flora gifts her a mysterious hagstone. Kath finds herself reliving an ancient legend which inspires the courage in her to answer the battle cry and finally become a warrior queen.