In colonial India of the late 19th century, a group of peasants lives under the yoke of a British oppressor who demands an excessive tax called "lagaan." The life of the community becomes even more complicated when the arrogant British officer challenges the farmers to a game of cricket, suggesting that if they win, the tax will be canceled for three years, but if they lose, they will have to pay double.
Among the peasants stands a brave and determined young man who refuses to accept this unjust deal. Hoping to free his people from suffering, he begins to gather the villagers to train them in the unfamiliar game of cricket. Despite initial distrust and a lack of knowledge about the rules, the young man manages to inspire his compatriots, who unite for the cause and overcome their differences.
As training sessions progress, emotional subplots emerge, such as the love between the protagonist and his sweetheart, and the internal struggle of some with tradition and change. When the day of the match arrives, the tension is palpable, as not only the future of the peasants is at stake, but their dignity as well. Faced with a trained and advantaged British team, the peasants prepare for the final battle on the cricket field. The film blends drama, music, and a touch of humor, culminating in an emotional struggle for justice that transcends beyond the sport.