Raanjhanaa tells the poignant tale of a young man named Sethu (played by Dhanush), who lives in a quaint village in Tamil Nadu. The story takes a dramatic turn when Sethu falls in love with a beautiful and spirited girl named Anuradha (played by Priya Bhavani Shinde). Their love story is not just a simple romance but a complex web of emotions, cultural traditions, and the stark realities of life. The film explores themes of love, sacrifice, and friendship, presenting a nuanced portrayal of human relationships.