Two youngsters Adi and Tara are attracted to each other when they meet at a wedding. Since they do not believe in marriage, they decide to live together. What follows forms the crux of the story.
O Kadhal Kanmani, also known as OK Kanmani, is a 2015 Indian Tamil-language romantic drama film written, directed and produced by Mani Ratnam. The film stars Dulquer Salmaan and Nithya Menen in the lead roles, portraying a young couple in a live-in relationship in Mumbai. Prakash Raj and Leela Samson play supporting roles as an older couple in the film, portraying the younger couple's landlords. The film was said to be a "reflection of the modern mindset of urban India", dealing with issues such as marriage and traditional values.