Iona Sheehan arrives in County Mayo, Ireland, intent on finding out more about her family's legacy of magic. When she meets her cousins, Branna and Connor O'Dwyer, she tells them she's had dreams about an evil sorcerer named Cabhan. More than 800 years earlier, their ancestress, Sorcha, the original Dark Witch, thwarted Cabhan's plan to steal her powers, and he has been plotting his revenge ever since. Iona begins putting down roots in Ireland, but her happiness may be short-lived unless she and her cousins can harness their powers and defeat Cabhan. Roberts works literary magic as she begins this new trilogy.