Catherine has a life she doesn't deserve and magic she doesn't want.
Catherine spends her days tending her garden and trying to avoid the resentful gaze of her staff and deceased husband's relatives. She meddled with the fae and they killed her husband. The guilt of her role in his death is eating her alive, but she can't seem to leave Thornwood behind. Her magic is stronger there and plants thrive under her care. Her life was peaceful, until a creeping vine escaped from Faery and it's not only choking gardens of Thornwood village but corrupting the minds of those who come in contact with it, turning them into mindless zombies.
One of the infected is Catherine's niece, and despite her best efforts, she cannot heal her alone. After the accident, she swore never to speak to Ray again. But with three days until the plant kills her niece and the other infected, she must put aside her vow to save them. To stop the spread, they must find the plant's origin and destroy it with Catherine's fledgling magic. If she hopes to succeed, she'll need to learn more about her powers and her fae heritage.
While she fears the consequences of using magic, she risks it as a penance for her sins. Her magic flourishes beneath Ray's tutelage, as do her feelings for him grow until Edward returns from the dead. He offers her a way to cure the village in exchange she must give up magic. Like a fly caught in a web of fae intrigue, Catherine must choose a side: humanity and the husband she pledged her life to or the fae and the blooming love between her and Ray.