After a tragic accident leaves twelve-year-old Cally Harper and her brothers orphans, they find themselves shipped off to live with their estranged grandmother in the wilderness of Dartmoor. This new life is not what Cally imagined: Cannon Farmhouse is old and falling down, there's no hot water, and even worse, no Internet!

To make matters worse, Grandma Wolfe is all the things that Cally doesn't like-bossy, strict, and a figure of authority. But Grandma Wolfe is also hiding a secret: she's from a long line of ancient Dartmoor Witches.

When Cally discovers she too has Vision-a power that allows her to see the ghosts of animals and people-she's thrown into a world of witchcraft, mayhem, and dark legends. And as soon as Cally finds out about her new abilities, she's caught up in a grisly murder that has undeniable links to the tragic Legend of Jay's Grave.

Realising that the perpetrator appears to be targeting anyone linked to the Dartmoor Witches, Cally must adapt to her new world and strive to solve the murder, otherwise she and her brothers may be the next victims...