Kunjoonjamma Thomas (Padmini) is a widow living in the village all by herself. People always make fun of her because she is grumpy and depressed due to the deaths of her husband and her only child. Children irritate her by ringing her door bell and running away. One day, her granddaughter Girly (Nadhiya Moidu), who she had never met, visits her. Initially, Kunjoonjamma does not like Girly, but they soon become close to each other. Kunjoonjamma takes down the door bell, saying to Girly that its only purpose was for Girly's return. Now that Girly is with her, she does not need it. Kunjoonjamma's neighbor, Sreekumar (Mohanlal), falls in love with Girly. One day, Sreekumar's friend, Alexi (Fazil), comes to his house and sees Girly. He identifies her as a girl missing from Delhi, and immediately informs her father (K. P. Ummer) about her whereabouts. Girly had run away from Delhi because she had a brain disease and does not have much time to live. She wanted to enjoy the rest of her life. When her father comes to take her back to Delhi for an urgent operation, she refuses to go, claiming that even the doctors are not sure whether the operation will be successful. Her grandmother mixes sleeping pills in soup and gives it to Girly, and her father takes her to Delhi while she is unconscious. The movie ends with the ambulance slowly fading away into the darkness. Sreekumar watches it leave, and when he turns away he sees Kunjoonjamma refixing the doorbell with the hope that Girly will return one day.