Rajnigandha is a tale of Deepa who is in long-term relationship with Sanjay. A job interview call from a college in Mumbai re-acquaints Deepa with her first love Navin whom she had split up with under some bitter circumstances. Navin helps her there in everything and this rekindles her feelings for him. Upon her return to Delhi, she gets confused between Sanjay and Navin when it comes to her choice. She gets that job and at the same time Sanjay gets promotion. Eventually Deepa takes her decision that forms a climax of the movie.