Shonna belongs to a cohort of teens called by Yesher to fight evil and protect the children of earth. Endowed with Triune Power, armed with swords of hallowed metal and spiritually wise beyond their years, the Slayers face off with Belial's wicked minions to demonstrate Yesher's sovereignty in their small Massachusetts town.

The battle becomes very personal when Shonna's widowed mother unknowingly marries a Familiar Spirit who has taken on the human form of Ian Corbet. Distracted by her own developing relationship with fellow Slayer, Jake Hannaford, Shonna struggles to maintain her focus on rescuing her mother from Ian's nefarious plot, even if it means personally killing her new stepfather...or die trying.