It is the Tamil remake of 'Big'. SJ Suryah is a young man with an immature mind. He falls in love with Simran and gets married to her. The troubles that they encounter form the story.

Suryah plays a child who enraged by his mother's nagging goes to a mad scientist (Manivannan) and has himself transformed into a 28-year old. In his new found adulthood, he starts an unwitting love affair with the daughter (Simran) of a toy store magnate (Nasser), and gets a job as a designer of children's toys.—Joyojeet Pal