Kakkakuyil film is about Sivaraman(Mohanlal) who has come to Mumbai for a visa. However Sivaraman finds his good friend Govindan Kutty (Mukesh) amidst a sea of issues. Sivaraman is compelled to take part in a financial institution theft deliberate by Thomas and his gang, which places them in additional hassle.They usually discover a place as Kunjunni with the physique of Govindan kutty and sound of Sivaraman in the home of a blind previous couple (Nedumudi Venu and Kaviyoor Ponnamma), whose grandson Kunjunni who had left them a very long time in the past (when he was 7) and is now coming house.However a flip of occasions finds Sivaraman and Govindan kutty (mixed) as Kunjunni with the physique of Govindan kutty and sound of Sivaraman.