Day and night he roamed the city, searching for a glimpse. He lived solely for this task. The sexual murderer strikes at full moon. His latest victim: a ten-year-old girl. The perpetrator leaves behind cigarette butts, blood, and pubic hair. The inspector hunts him down with the obsession of a man who must compensate for a personal tragedy. He is new to the small southern Spanish town, and his colleagues view the former informant in Franco's service with suspicion.