3Devi is a riveting story of a leading actress, an entrepreneur and bride-to-be, and an assistant director who are fed up with male chauvinism in their respective fields. On a particularly trying day, the actress and the assistant director leave their film set in the middle of a shoot, while the bride leaves her groom at the church altar. The three women band together to take a relaxing hiatus away from their problems. But a sudden turn of events forces them into a battle for their lives.

Classmates Ramachandra and Janaki meet after 20 years of graduating high school at a reunion. They start reminiscing their past days and talk about their present lives.

The film revolves around a hardworking man Krishna who lives in Hulidurga and is famous for traditional oil extraction. He is torn apart from being the rightful owner with the entry of business tycoon Devi Shetty. Will Krishna fight against all odds to bring justice to his people? Who will become the real `Yajamana` is what forms the crux of the story.

Parvathi, an honest lawyer and her short-tempered son Mohandas file a court case against Sharath Kaale - the arrogant son of wicked politician Prakash Kaale. Prakash, wanting to see his son as a successful politician, is not happy with the case filed by Parvathi. He begins to threaten Parvathi and Mohandas. Mohandas must now channel his anger and make logical use of law and order to put up a fight against Prakash.