Directed by Palnati Surya Pratap, Kumari 21F is the story of Siddhu, a chef who falls in love with Kumari, a struggling model from Mumbai. Their love story takes a turn when Siddhu begins to doubt her fidelity. Owing to his immaturity, she rejects his marriage proposal leading to more complications in their relationship. The story moves forward with Siddhu's realisation of the truth and his attempts to unite with Kumari. Kumari 21F is the Kannada remake of the 2015 Telugu hit with the same name.