In her hometown of Salem Lily Proctor endures not only life-threatening allergies but humiliation at her first high school party with her best friend and longtime crush, Tristan. But in a different Salem -- one overrun with horrifying creatures and ruled by powerful women called Crucibles, she is Lillian, the strongest and cruelest Crucible ... Lily's other self in an alternate universe that Lily suddenly finds herself where she is torn between responsibilities...

Lily Proctor has come a long way from the weak, sickly girl she used to be. She has gained power as a witch and a leader, found her way home, and has chosen to face battle again. And after her recent losses and betrayal, she has learned more about grief than she ever wanted to know. Thrust once again into a strange society, Lily is determined to find a way to defeat the monstrous Woven without resorting to nuclear weapons or becoming a tyrannical...

When shy sixteen-year-old Helen Hamilton starts having vivid dreams about three ancient, hideous women and suddenly tries to kill a new student at her Nantucket high school, she discovers that she is playing out some version of an old tale involving Helen of Troy, the Three Furies, and a mythic battle.

With help from her new friend Orion, seventeen-year-old Helen Hamilton descends into the Underworld in search of a way to break the Furies' blood curse and prevent the star of another Trojan War.