After his last solo effort, Nick Tschiller is waiting for disciplinary proceedings. His daughter Lenny put him on occupational therapy ? on new work. There her former teacher Patti Schmidt runs a home for difficult young people. While Nick takes on the new task and works with the young people, Yalcin Gümer and the new LKA colleague Robin Pien investigate a case of drug trafficking on the dark web on the mainland together with colleagues from the cybercrime department. Gumer wantsbring two key witnesses to a so-called safe house in Spain, the brothers Tom and Eddie Nix. But Eddie is shot dead by a sniper while he is resting on the way to Frankfurt Airport. Since only the closest circle of colleagues was familiar with the travel planning, Gümer feared a mole in his own ranks.
That's why he brings the traumatized Tom to Neuwerk to hide him with Nick Tschiller. However, Eddie Nix's killer is already after Gümer.