Watch Sai Sawat Yang Mai Sin (1982) Official Trailer

A father has got two children, i.e. a son Pinit spending his youth in bar and a daughter Thip, and has also adopted a boy Kriang. This latter, after doing successful studies, is promoted general director of the father's company. He also falls in love with Thip. Pinit is very jealous and promises to get a revenge. Once the father is dead, he starts to destabilize the couple.