Callie Hoffman knows she has a good life in Kingdom, Kansas. She's thrilled to be engaged to Levi Housler, the new pastor of Kingdom Mennonite Church, and she spends her days working with her friend and soon-to-be sister-in-law, Lizzie Housler, at Cora's Cafe.
However, Callie's idyllic life is interrupted when a body is discovered on the road outside Kingdom and the deceased turns out to be a victim of a serial killer. As Washington County's new sheriff begins questioning Kingdom residents, Callie and the rest of the town are appalled at the prospect of a killer among them. The very reason Kingdom exists is to protect the people from the temptations and dangers of the outside world, but all the town founders' attempts to plan ahead couldn't prevent a threat like this.