Birgit Reincke (Veronica Ferres) is a resolute and quick-witted investigator in her early 50s who has supposedly given up her job. She is assisted by Jonas Becker (Tim Oliver Schultz), an aggressive and impulsive rookie detective, and Marie Sonnleitner (Salka Weber), a brilliant scientist from neighbouring Salzburg with a sharp mind and an unusual eye for crime scenes and connections. Three underdogs who become an unbeatable trio precisely because of their differences. They follow every lead, no matter how small, to solve a crime.