A brutal serial rapist has plunged Ludwigshafen into a state of terror. Young Detective Lena Odenthal of the Vice Squad faces her first major case, focusing her investigation on three men with prior convictions. When one of the attacks ends fatally - and Lena unexpectedly takes charge of the Homicide Division - she decides to set a trap for the perpetrator, unaware that in doing so, she is putting her own life at risk…