Annamalai (Prabhu) is a single parent to Karthik (Kalidas Jayaram) and owns an Indian restaurant in Malaysia. Annamalai is very fond of Karthik and loves to spend time with him, but Karthik is a fun-loving person who spends most of his time with friends and thinks that his father is too emotional. Karthik falls in love with his classmate Pavithra (Ashna Zaveri), daughter of an IFS officer (Urvashi) who is separated from her husband (Thalaivasal Vijay). Meanwhile, Mala (Pooja Kumar) is a don who falls in love with Annamalai as she is impressed by his cooking skill.

Annamalai worries that Karthik always prioritizes his friends than him. One day, they meet a saint named Swami (Kamal Haasan), who swaps both Annamalai and Karthik's souls to make them understand each other's love. Now Annamalai (in Karthik's body) goes to college, while Karthik (in Annamalai's body) takes care of the restaurant. Annamalai understands Karthik's love for Pavithra and gets close to her family. He also helps Pavithra's mother patch up with her husband in India. Similarly, Karthik understands the hardships faced by Annamalai in raising him from childhood following his mother's early demise and realizes his true love. Karthik also plans to have Mala marry Annamalai. There is also a don (M. S. Bhaskar) who happens to be Mala's boss and does not want her to marry Annamalai. The don kidnaps Pavithra and Mala. Following a comical fight, both are saved. Karthik apologizes to Annamalai for not understanding his love towards him. Immediately, both souls are swapped back. The movie ends with Karthik getting united with Pavithra, while Mala and Annamalai are also united.