1910: Sarah Harper arrives in the west of Ireland to research her father's theories on the supernatural and the folklore of 'The Good People.' She meets Anna, a local farm girl who is caught between the traditional world of her ancestors and the modernizing world around her. As Sarah documents the village's legends, she uncovers a dark secret that the locals are desperate to keep hidden. Present Day: A woman named Sarah finds herself in the same Irish village, seeking a fresh start after her life in New York falls apart. While staying in a local cottage, she discovers a century-old diary that hints at a mystery involving a missing girl and a story collector. As the two timelines intertwine, Sarah must navigate the thin line between myth and reality to uncover the truth about what happened a hundred years ago.