Sathya and Vijay are orphans and best friends. Since his younger years, Sathya worked hard to educate Vijay. Vijay, a young graduate, works as a driving instructor until he finds an adequate job. Sumathi falls in love with Viji. Bhavani, a childish woman, does not get married because she is cursed; all of her fiancés died before the marriage. Ameer Bhai and Sumathi's father Marthandan are friends and business partners. Ameer Bhai is involved in land grabbing and tries to sell Ganapathy Colony (wherein poor people, Sathya and Vijay live) to a gunrunner named Vadivel. Marthandan finally accepts for his daughter's marriage, but Vijay does not want to marry if Sathya stays single. Sathya gets married with Bhavani and Vijay with Sumathi. Marthandan knew that if Sathya and Vijay were together, he and Ameer Bhai cannot sell Ganapathi Colony. Even after the marriage, Vijay prefers to be with Sathya, so Sumathi becomes jealous of Sathya. Ameer Bhai, Marthandan, and Sumathi try to break their friendship in different ways.
Udan Pirappu was released on 15 August 1993.[4] Malini Mannath of The Indian Express wrote Vasu "weaves into the script sentiment and melodrama in good measure and though he diverges from the main theme [..] he returns to the main theme [..] knowing where exactly the script value lies."[5]
