While Nick Tschiller waits for his disciplinary proceedings at Neuwerk and helps a former teacher of Lenny, Patti Schmidt, in the care of difficult to educate teenagers, Yalcin Gümer and the new LKA colleague Robin Pien investigate a case of drug trafficking in Darknet. The Nix brothers are discreetly arrested and placed in a witness protection program. On the way to the safehouse, however, an incident occurs, as a result of which Nick Tschiller is once again in the thick of things.