For decades, the people of the village of Daggerhorn have maintained an uneasy truce with the werewolf, who prowls at every full moon, by offering the beast a monthly animal sacrifice to quench its appetite. But under a blood red moon, the wolf changes the stakes by taking the life of one of their own.

The victim is the older sister of Valerie, a beautiful, young woman, who has just found out that her parents have arranged for her to marry Henry, the scion of the town's wealthiest family. But Valerie wants only Peter, the poor woodcutter she has loved all her life. Unwilling to be parted, the couple was planning to run away together, but, in a horrifying instant, the wolf changes everything.

As the townspeople hunger for revenge, famed werewolf hunter Father Solomon is summoned to Daggerhorn to kill the beast once and for all. But Solomon's arrival brings only more turmoil as he warns everyone that the werewolf takes human form by day and could be any one of them. No one is above suspicion. Panic grips the town as the death toll rises with each red moon, tearing apart the once close-knit village. But it is Valerie who discovers she has a unique connection to the wolf that inexorably draws them together, making her both suspect...and bait.