Chinnabbayi is the story of a hostel caretaker, who is an orphan boy. One day, he punishes a girl after he finds out that she is upto some mischief. The girl then vows to teach him a lesson and gets him drunk without his knowledge. She then takes the drunk man and makes him sleep on a bed where another girl is already sleeping. Things take an unexpected turn after the girl with whom the caretaker shares the bed commits suicide.