On an old mining site in the heart of the Ruhr area, a dead young man in a Schalke 04 jersey is found behind the historic buildings. Margareta Sommerfeld, a women's clothing saleswoman and passionate amateur detective, had seen the boy just moments before. Has he gotten caught between the opposing sides of an investor group and a citizens' initiative, both fighting over the old mine "Bergmannsglück"? Another murder makes it clear to Margareta that time is of the essence...