He's trained to manipulate her.
She's trained to illuminate him.
Falling in love could kill them both.

Shunned Luminary Merrin, is an outcast Tracker guarding one of the borders closest to Tartarean's stronghold.

Called a reckless rogue by the other Luminaries, she's haunted by her past failures and there is no way she will let another reclaimed Luminary slide back to the dark.

Tarquin is a Hunter who survives with no memory of who he was before Lucius Tartarean coerced him into service.

Forced to kill on demand and to utilise his manipulation skills, he's nothing more than a slave to the dark that controls his every move.

When Merrin is called to Track a fallen Luminary, she isn't prepared for a half-light who shouldn't exist.