Bava Nachadu is a romantic movie in which, Ajay (Akkineni Nagarjuna) is an adman (director and actor) who has a definite idea about how his future wife should be like.
He gets married to a village belle Kamakshi (Simran Bagga), handpicked by his mom from her native town Kovvuru. After marriage, Kamakshi meets with a hairline fracture. The entire family of Kamakshi lands up at Ajay's house to take care of Kamakshi.
She has a beautiful and greedy sister called Lahari (Reema Sen). During that period Suma (Suman Ranganath), the regular model of Ajay, meets with a fracture and Lahari replaces her as the model opposite Ajay. During that moment, Lahari gets lured by the modeling profession and then falls in love with Ajay.
The rest of the film is about how Ajay manages to save his marriage without hurting Lahari.