Liberally spiced with quirky comedy and charged emotions, this family-oriented drama revolves around Sudheendran, fondly called Sudhi by everyone. He lives entirely for his family, which consists of his aged mother, his two aged unmarried paternal aunts, an elder sister and a younger sister. His elder sister Shanta is deserted by her husband immediately after her marriage, as she as a condition that causes frequent seizures.
Sudhi, who has no regular job, is the substitute in every affairs of the village and manages things somehow. And thus, he is a substitute teacher in a tutorial college when some teachers fail to come, and is a substitute actor in the drama company run by Kovilakam Sreedharan. He helps Sreedharan in his real estate business and even as his driver.
Sudhi has a lot of debts and to settle them he allows Panathakolli Paul, a money lender in his house's attic. Sudhi also gets support from Pavithra, who is in love with him and also from her father Padmanabhan, whom he often addresses as Guruji.
Sudhi also has some enemies in the form of his paternal cousins Vijayan and Vinayan, both of whom are assisted by a crooked politician brother-in-law and advised by an equally crooked uncle. As the house Sudhi inherits is in the name of Vijayan's father, the gang of villains is all set to make life a hell for Sudhi and oust him and his family of five from the house and take over the other property from them.
The arrival of Unni Menon and young daughter Saraswathy, lovingly called Sathi, makes much turn Sudhi's life. Sathi, who is also a doctor, is the childhood friend of Sudhi. He begins to love her, but her engagement is soon fixed with Vinayan. She is also ready to tie the knot with Vinayan. But in course of time Sathi realizes Vinayan's immoral nature and corrupt practices, and balks from going through with the marriage.
His paternal cousins and their family take this as an insult and believe that Sudhi is behind her change of mind. Then, they prepare to take the last move and make Sudhi repent for this. What follows is how Sudhi manages to change the attitudes of his enemies towards him.