Someone is out to get revenge against Milt Kovak, sheriff of Prophesy County, Oklahoma, and his team with a series of pranks. First a sinister note is found taped to the office front door. Then the alarm system is tampered with and a dummy found hanging from a light fitting in the interrogation room.

If that wasn't disturbing enough, things start to escalate when the brake lines on Milt's deputy Anthony's car are cut, causing his wife Maryanne to crash. Meanwhile, two friends of Inez Pettigrew, mother of Milt's other deputy, Dalton, are taken to hospital with arsenic poisoning after eating her peach melba.

It's not long before Milt and his team have a murder investigation on their hands. And if Milt doesn't find the killer soon, his own nearest and dearest could be next in line . . .