The movie begins in front of a church in 1980 when the foursome first become friends. The scene is transitioned by the quote "Thomasootty Vittodaa!".
It proceeds to introduce each of the four friends' life. Mahadevan is married with one daughter. He is a teacher. Govindan Kutty is a "businessman" whose wife works in Dubai. He is preparing to leave to Harihar Nagar just like Mahadevan and Appukuttan who is a dentist and often fights with his wife and kids (possibly twins). They are all going to Harihar Nagar for Thomasootty's wedding and preceding ceremonies.
While they meet, they come up with the idea of being 'younger' and enjoying the 10 or so days that they stay together. Reluctantly Appukuttan throws away his glasses. Mahadevan suggest that they make problems in the neighborhood because according to him, with problems come youth.
While staying at Govindan Kutty's house, they are greeted with flowers left at the doorstep with a name tag "Maya". Immediately thinking that this is their old Maya, they go to meet her. They barely miss her, but Appukuttan throws a rock and breaks her car's rear window. An anonymous woman steps out of the car. But it is not "their" Maya. They are immediately arrested. Later, "Maya" comes and gets them out of jail saying that they are her friends and didn't recognize it because she hadn't seen them in a long time. Once out, she says not to bother her anymore because of this. Maya lives right across Govindan Kutty's house. So trying to find the weakness that will draw her attention, one night Appukuttan looks over on to the window and is frightened by the sight of a ghostly figure with a "burned" face. Thomasootty is not staying with the other 3 on that night, but he arrives the next morning. Mahadevan says a sentimental story to make Maya not believe that they're here for the wrong reasons. She later comes and visits them and becomes their friend. A hilarious sequence follows, which ends in apparent tragedy when the other three see Thomaskutty being killed by a bomb.