Shiva Shiva and Indhu Madhu Shalini are college students who fall in love, and their bond is met with firm opposition from Indhu's family. Her father Gopalakrishnan Abhishek Shankar, along with Indhu’s mother, challenges the idea of love and tries to steer Indhu away from the relationship, a plan she resists. One day, Indhu’s mother hands them a book titled Pathinaru and asks them to read it, hoping the pages might shift their opinions about romance and perhaps offer a new lens through which to view their feelings.
The narrative then shifts to a village in the 1980s, where a teenage romance unfolds between Gopi and Ilavarasi Kasturi Shankar. Gopi, coming from a poor background, falls for Ilavarasi, who belongs to a wealthier family in the same village. The lovers’ families stiffly oppose the union, and the lovers themselves attempt to escape to a different life. They are eventually caught, but Ilavarasi goes to great lengths for Gopi, even renouncing her family’s wealth. She asks Gopi to earn enough to buy her a saree with his own income so she can leave the village, forsaking her inherited riches and the comfort of her status.
Gopi heads to a nearby town to earn money to buy the saree, but tragedy interrupts his plans: he suffers an accident, slips into unconsciousness, and is saved by a lorry driver. He spends months in a hospital regaining his strength, and finally returns to the village only to discover that Ilavarasi’s wedding is scheduled for the same day. The shock sends him into a spell of sorrow, and he leaves the village in despair.
The book’s tale ends with a pivotal revelation: Gopi is none other than Indhu’s father, Gopalakrishnan. Indhu’s mother explains that Gopi transformed into the prosperous Gopalakrishnan, suggesting that his success came at the cost of grappling with a past romance. This revelation plants seeds of doubt in Indhu about the credibility of love, nudging her toward her parents’ viewpoint.
Meanwhile, Shiva refuses to abandon the possibility of love after all the twists. He travels to the village to uncover Ilavarasi’s whereabouts, meeting many people along the way. Eventually, he locates Ilavarasi, who now runs an orphanage in memory of Gopi. Seeing Ilavarasi again, and hearing how she has carried Gopi’s memory forward, weighs heavily on Gopalakrishnan too. He learns that Ilavarasi never consented to the wedding and left her family to preserve the connection she shared with Gopi.
This encounter awakens Gopalakrishnan to the enduring power of true love. He returns with a renewed belief in the heart’s needs and resolves to bring Shiva and Indhu together, paving the way for their marriage. The tale thus intertwines two timelines—one contemporary and one historical—about love, sacrifice, memory, and the idea that love’s influence can transcend time, shaping the decisions of those who come after.
