They called it the Thorn Hill Massacre - the brutal attack on a once-thriving Weir community. Though Jonah Kinlock lived through it, he did not emerge unscathed: like the other survivors Jonah possesses unique magical gifts that set him apart from members of the mainline guilds. At 17, Jonah has become the deadliest assassin in Nightshade, a network that hunts the undead. Emma Claire Greenwood grew up worlds away, raised by a grandfather who taught her music rather than magic. An unschooled wild child, she runs the streets until the night she finds her grandfather dying, gripping a note warning Emma that she might be in danger. The clue he leaves behind leads Emma into Jonah's life - and a shared legacy of secrets and lingering questions.