Althalia Cabrera is desperately trying to do the right thing, but exactly what the right thing is has never been murkier to the young bruja. She can either accept the help of her indigenous religion's ancient death gods and save the life of her beloved abuela, or face the loneliness of being the last of her kind. Shattered by grief and surging with her growing power, Althalia is about to show the underworld what can happen when you threaten the wrong witch's sweet little abuela.