The Heirs (1960)

A famous multimillionaire ,Omar Porassis ,dies.While his numerous cousins and nephews fight over the inheritance,two crooks,Gaetan and Chantal -brother and sister who hate each other- covet the pile and have the same idea: to find a third person who would get the whole legacy and who would be naive enough to relinquish it .Perassis has two natural children: Chantal and Gaetan set their hearts on each of them.