Köln. Public prosecutor Wolfgang von Prinz is alarmed: Ingo Broich, the managing director of the cleaning company of the same name, was stabbed to death in his neighborhood. Everyone in this upscale Cologne neighborhood is well known. But his wife, attorney Beate von Prinz, also has close business ties to the murder victim's father.

Faber and his team investigate when a teenage girl is found dead.

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A man's murder gets wrapped up in a steel works conspiracy.