The human mind can be deceitfully wicked and holidaying English Inspector Alec Marsh well kws it. He is naturally intrigued when blood is found in a fellow traveler's motel unit, without a trace of either a victim or perpetrator. The suspected crime does t fit New Zealand's safe image. Has trouble struck the tour group from an external or internal source? Liaising with the NZ Police to help solve the mystery, Marsh seeks to uncover the evolving relationships and tensions among those aboard, as the coach travels down through the North Island. The intriguing deceptions at work are finally brought to a surprising conclusion.