Herding Sheep

In a small town, a horrific attack occurs on a young couple right in their own apartment. The girl is brutally killed, but what is strange is that her boyfriend's life is spared. Senior detective Rouns, going through tough times,... takes on this case, unaware that this is just the beginning of a bloody series of murders. The threads the detective follows break and tangle, and the mocking letters from the killer only complicate the investigation. Who is capable of crossing the line of humanity, taking life after life? Who will be the next victim? And how can this horror be stopped when the killer acts so simply and neatly that even the surviving witness can provide no valuable information?