Blood Will Out by Jo Treggiari

Ari Sullivan is alive—for now. She wakes at the bottom of a cistern, confused, injured and alone, with only the shadowy recollection of a low-pitched voice and a gloved hand. No one can hear her screams. And the person who put her there is coming back. The killer is planning a gruesome masterpiece, a fairytale tableau of innocence and blood, meticulously designed.

Until now, Ari was happy to spend her days pining for handsome, recent-arrival Stroud Bellows, fantasizing about their two-point-four-kids-future together. Safe in her small hometown of Dempsey Hollow. But now her community has turned very dangerous—and Ari may not be the only intended victim.