Munna Bhai (Sanjay Dutt) is a local Mumbai goon. One day while chasing one of his victims, he runs into Komal (Aishwarya) in a dance school, where she is a teacher. Munna is so smitten by this green eyed beauty that he falls in love with her at once. On the other hand we have Dr. Rastogi (Amitabh Bachchan) a psychiatrist & Komal's elder brother. Munna starts to visit Dr.Rastogi for his treatment because everywhere he looks he sees only Komal around him. Due to this he becomes such a softie that his job starts to get affected. Rastogi on the other hand is clueless that this goon he is treating, is in love with his very own sister and his biggest nightmares are about to come to alive. The beautiful Komal unaware of the madness around her, is hopelessly in love with Raja (Ajay Devgan) who works in a club & and bowling alley.Together the couple convince Rastogi that Raja can play bodyguard to Komal. To escape the chaos, Rastogi whisks his darling sister away to Malaysia with Raja but it doesnt end there. Munna follows him only to realise that Komal is his doctors sister. What will happen next ? Will Komal be able to tell her brother about her love. Or will Munna be able to marry Komal ?