After the failed attack on Sarah Liebert, in which the assassin escaped unrecognized on a motorcycle, Ina and her team are looking for a motive for the act. When they find out that a former classmate of Sarah Liebert was murdered just a few days ago, the investigators suspect a connection. Investigator Ina Zimmermann has the feeling that the new investigator, Moritz Brenner, is secretly collecting information about her and her colleagues.