Samuthiram (2001)

Selvarasu is the head of the family and his two brothers Thangarasu and Chinnarasu are ready to give up their life for him. The three brothers think the world of their sister Rasamani. A rich man from the neighboring village feels insulted when Thangarasu mishandles his son, and to take revenge, he makes Rasamani his daughter-in-law. Starting with taking away all of the brothers' wealth, he insults them at every opportunity while ill-treating Rasamani. What transpires later forms the crux of the story.