Chief Inspector Katharina Rosenberg is in the midst of a kidnapping case when she is contacted by profiler Mark Gruber. He is investigating a nationwide series of murders and suspects a former BKA officer. During his inquiries, he has come across evidence suggesting that this police officer may have caused the car accident that resulted in the death of Katharina's daughter, Sarah. While Chief Inspector Rosenberg pushes forward with the search for the abducted victim, she, together with Mark, attempts to uncover the background of the events that occurred eighteen months ago. When an unexpected turn of events occurs, she steps off the conventional path of police work and puts herself in great danger.