Aval Oru Thodar Kathai 1974

Kavitha is a working woman to support her widowed sister, unmarried sister, her blind younger brother, her mother, her drunkard brother Murthy & his family. Her brother not only does not take responsibilities, also creates problems for her. Her longtime boyfriend, Tilak wants to marry her, but she doesn't because of her commitments. His eyes now wander to Kavitha's widowed younger sister Bharathi who reciprocates his feelings. Kavitha, after reading her boyfriend's love letter to her sister, arranges for them to get married, thus giving up her chance. Meanwhile Prasad loves Bharathi but when he comes to know that she loves Tilak, he sacrifies his love for her and he marries Kavitha's distressed friend, Chandra. Kavitha eventually accepts a marriage proposal of her boss, when she realizes that her brother has become responsible enough to take care of her family. She decides to resign from hard work, but could not as the result of turning point in a typical Balachandar style climax.