1998. A sixteen-year-old girl is found dead on school property, dressed in white and posed on a swing. No known cause of death.

Four girls know what happened.

And until now they’ve kept their silence.

Violet is returning home, back to the sleepy coastal town which holds so many memories.

In 1998, after a tragic accident claimed the lives of her father and sister, she joins Elm Hollow Academy, a private girls’ school with an unpleasant history of 17th-century witch trials.

There she is drawn to Robin, Grace, Alex and their charismatic teacher, Annabel; she is invited to join them in their advanced study group.

There they learn about art, literature and the grisly history of the school. Though Annabel claims her classes aren’t related to ancient rites and rituals, she warns them off the topic, describing it as little more than mythology. However, the more the girls learn, the more they start to believe that magic is real, and that together they can harness it.

But when the body of a former member of the society is found on campus nine months after she disappeared, fingers are pointed at those closest to her. Leading Violet to wonder whether she can trust her friends, teachers, or even herself.