Something scared Nuala Flaherty to death. When her body is found in the center of a pentagram on a lonely moor in the shadow of Ben Shee mountain, Rebecca is determined to find out what killed her. Was her death caused by supernatural means or is there a more down-to-earth explanation? The body was discovered on the Island of Stoirm, about which Rebecca has some complicated feelings. Her beloved father, a career policeman, came from there, but he fled the island's and his own family's dark history, and Rebecca herself had a brush with death while pursuing a story there. But there's no way she can avoid going back. Besides, her dear friends, photographer Chaz Wymark and his partner, Alan, are about to be married on Stoirm, causing a small stir in the isolated island community.

Rebecca's investigation will lead her to a mysterious cult and local drug dealings. But what she doesn't know is that crime matriarch Mo Burke still has her in her crosshairs. Mo wants payback for the death of her son, and after one failed attempt to hurt Rebecca, she's upping the ante. And this time, it could be lethal.