Their third case leads Berlin chief inspectors Nina Rubin (Meret Becker) and Robert Karow (Mark Waschke) to the scene of a gruesome murder in a shopping center car park. Katharina Werner, mother of a son, dies there after being brutally run over by a jeep. The surveillance cameras show a car with tinted windows, but the driver and the course of events cannot be identified. The keeper of the jeep, Birgit Hahne (Valerie Koch), is targeted by the investigations. She used to be friends with Katharina, but then the neighbors took different paths. However, they seem to have shared one interest until the end – namely that of Katharina's husband Carsten Werner (Steffen Münster). Despite a possible motive, Birgit Hahne stubbornly protests her innocence.
Using the video surveillance of the parking garage, Rubin and Karow also come across three girls who were there at the time of the crime: Louisa (CosimaHenman), Paula (Emma Drogunova) and Charlotte (Valeria Eisenbart), schoolmates of Katharina Werner's son Ben (Béla Gabor Lenz). The three of them were at the shopping center on the day of the crime to "party" because it was Charlotte's birthday. Confronted with the murder in the parking garage, the pubescent trio of girls reacts with complete indifference. Much more important to them than anything else is their smartphone, which they use day and night. Nina Rubin and Robert Karow have to deal with unsympathetic young people and overwhelmed parents and come across a wall of silence during their investigations. When they try to break through, they only earn scorn and ridicule from the teenagers.
Nina Rubin in particular gets to the edge of her self-control in the face of such callousness. Parallel to the current case, Karow is intensively searching for a mobile phone video that is connected to the murder of his former partner Gregor Maihack.