In the absence of a conscience, men need something to fear. I've made myself their monster.

Every person Harlow Carrenwell kisses dies immediately, and that's the way she likes it. The poison-lipped youngest daughter of Lunameade's magical founding family has used her power to annihilate their opposition.

Her first husband is in the ground. Her mysterious new betrothed is next.

But Harlow has a secret. When she's not acting as an assassin at her parents' whims, she moonlights as a vigilante hunting abusive men in their walled-off city.

Meet a man. Lure him in. Kill him with a kiss. Until one night Harlow kisses a mark and he doesn't die.

Worse, the man immune to her kiss is her new betrothed, Henry Havenwood, and now he knows about her double life. The only way to protect her secret and her city is get close enough to Henry to figure out why the Havenwoods have reappeared after years of silence and what they have planned.

Cursed with a husband she can't kill and trapped in a fortress surrounded by vampire-infested woods, Harlow's survival requires her to do the impossible: Make the man who knows she's a killer fall in love with her anyway.