A sinister Episcopal Bishop shows up to confirm Lottie and Josie Albright's niece at the new frame church built on the corners of four Western Kansas counties. Suddenly, the Reverend Mary Farnsworth flees to the anteroom after dropping the chalice during communion. Josie, a psychologist, lingers after the service to comfort her, but Lottie orders her sister to leave when they discover Reverend Mary's body. As Deputy Sheriff, Lottie's duty bound to attend to the death.

Back at the county-wide picnic, an elderly lady informs Lottie that a man kneeling next to her scared Reverend Mary into a heart attack. Lottie soon learns that the beloved Reverend Mary was a woman without a past, and that the rogue Bishop has unexpected ties to Western Kansas. A sheriff from an adjacent county, unaware that Josie is an FBI consultant, assumes that seizing control of the investigation will be easy and instead arouses the twins' wrath.

Forgetting that the past is always present, Lottie's investigation into old documents riles up murderous century-old rivalries....