Dhanak is a story of a little boy, who has lost his eyesight, and his sister Pari set out across Rajasthan on foot. Their mission, spearheaded by Pari’s determination, is to restore Chhotu’s sight.

Every morning Pari (Hetal Gada) and Chotu's (Krrish Chhabria) long walk to school begins with the toss of a coin outside their hut. The winner will decide if the story that will be told on the way to school that day will be one about a Shah Rukh Khan film or a Salman Khan film. The siblings are rivals in their love for the two stars. Pari is devoted to Shah Rukh and Chotu worships Salman Khan (down to wearing a replica of the star's trademark silver bracelet with a blue stone).

Ten-year-old Pari holds her precocious eight-year-old brother's hand throughout the journey to school and back. She's not just his friend and sister but, since Chotu is visually impaired, she's also his guide. With just months to go before Chotu turns nine, Pari feels the pressure to fulfil her promise to her brother - that he will have his eyesight back before his ninth birthday.

Hope floats when she spots a poster of Shah Rukh Khan (SRK) encouraging eye donations. She begins to write him letters, which of course go unanswered but when Pari hears that her idol is shooting a movie in Rajasthan she has her mission. Convinced that a meeting with SRK is all it would take to get Chotu his eyes back, the children set off alone on a 300 km journey traversing testing terrain.