Kaialavu Manasu depicts the the story of a widow named Sharada, who is faces the challenge of being diagnosed with a deadly heart disease. Due to the helplessness of her situation, she decides to give all three of her children for adoption. Sharada then undergoes a critical surgery due to the generosity of a philanthropist named Gururengan, and she manages to escape death. . Soon she begins to regret her decision of giving up her children and desires to bring them back.
But upon her friend, Gururengan’s advice she gives up the idea and moves with her life by starting a new career and working with the man who saved her life. Although many years pass by, even as a successful woman, Sharada is unable to forget about her children and tries again to find them, only to realize that they have grown up and moved on.
So she is left with the decision of either entering back into their lives or watching them continue and move on it as it is. The series was aired on the Sun TV channel from the year of 1981 till 1984 and was directed by K. Balachander.