Pattu Saree depicts the life of Kanchi, a self-made business woman who owns a silk saree showroom. She adopts a son, believing her twin daughters were killed in a car accident. However, one of her daughters became a sales girl in her shop and later fell in love with her adopted son to marry him. However, Kanchi is not fond of this girl, Thamara, until she realizes and recognizes her to be her daughter. This happens when her husband rejoins the family, against the will of Kanchi, her mother and her prospective husband. Kanchi has serious ill feelings toward her husband, whom she holds responsible for all the losses in her life. One of the twin girls also joins the family. However, towards the end of the serial, Kanchi is finally reunited with her family of two girls and husband. She also realizes her mother's plotting against her husband which made them foes all these years. The family soon rejoins under the father and she hands over her responsibilities to her children and starts a new journey with her husband Rajarathnam.