K. R. Chellam

Thaai Ullam

The film is based on two couples – where the first couple Dr. Chandra Shekar (Gemini Ganesan) & Parvathi (Anjali Devi) and the second couple is Ravi (A. Nageswara Rao) & Lakshmi (Savitri). Ravi & Lakshmi are happy lovers. Ravi is summoned and asked to marry another girl forcibly. Since his father's life & honor are at stake, Ravi agrees to the marriage. Simultaneously another marriage takes place in the same village Dr. Chandra Shekar visits his best friend's sister marriage but the marriage cancels in the last moment due to dowry problems to keep up his friend's prestige Shekar marriage's his sister called Parvathi. Due to sudden marriage, the couple doesn't see each other. Thereby because marriage is happening without his wish Ravi also not seen the bride's face. Both the bridal parties traveling on the same train which run into a disastrous accident. In the accident Ravi's parents and wife are dead.

Meera, a zealous devotee of Lord Krishna, considers him to be her husband. She gets married to Rana Bhojraj, but follows her own way of living which is not acceptable to her husband and the society.

Chellam begins to suspect her husband, Dr. Vembu, of having an extramarital affair after spotting him with another woman.

A man named Kulasekaran comes to Vanarajapuram forest with his wife and little son Karzan to find the secret of Amirdharasam (elixir of life) after fighting with his father Veerasingam, who disapproved of his plan to be in the forest. After considerable efforts for several days, Kulasekaran finds the Amirdharasam secret, which he writes in a piece of paper and locks it inside a locket on Karzan's necklace. Veerasingam, on learning of the death of his son, comes to the same forest with his adopted daughter Leela to find his grandson.