Solving mysteries is part of Wilsberg's daily routine. However, gathering evidence to accuse an employee of theft is a different challenge. Fabian Barkland, the majority owner of a traditional pumpernickel bakery, hires the Münster-based private detective for exactly this reason. Meanwhile, Tobias Nagel, a committed member of the workers' council, staunchly stands up for employee rights. As Wilsberg delves into the investigation, he navigates the fine line between loyalty and legalities, uncovering secrets that could threaten the very foundation of the bakery's legacy.