The Tube: This is the opportunity of a lifetime: Sabine Fink, a young, ambitious public prosecutor, is entrusted by Chief Public Prosecutor Grabowski with the spectacular case of a tunnel disaster. A catastrophe that cost the lives of entire families. The question of guilt is as good as clear: the truck driver Roman Sikorski drove into a queue of cars while overtired and at far too high a speed. But Fink notices irregularities the first time he looks through the files.