Industrial butchery owner Walther Holler was murdered at home. To save a major contract, he illegally imported sub-standard Balkanic meat for traditional German products, and was being blackmailed. Walther's kids and their spouses all worked for the firm, but got along badly, with diverging goals. Son Christian and wife Bettina are successful and ambitions, Bettina running a linked catering-firm while Christian dreamed of international expansion, but Walther objected, even reconsidered stepping down as CEO. Bettina hides even for Christian a secret with Walther. Daughter Simone and her husband Marco are relative losers, she doing the accountancy, Marco working off debts as lowly floor supervisor after a failed venture, they plan to move to Portugal, but Walther Holler refused an 'inheritance advance'. A paternity test swings the case.