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While visiting her cousin Abby (Lynn Redgrave) at lavish Langley Manor in the deep South, Jessica is among those present when patriarch Denton Langley (Dan O'Herlihy) is accidentally killed during a fox hunt. What is puzzling about the situation is that Langley's normally docile horse was startled enough to throw the man to his death. Later on , Langley's daughter is also killed, and all evidence points to a single, and very unusual, suspect: Langley's beloved pet dog (and sole beneficiary) Teddy! Country singer Roger Miller appears as the local sheriff.