Mahabharat presents the story of the throne of Hastinapura, the kingdom ruled by the Kuru clan. The Kaurava and the Pandava brothers compete for rulership. Although the Kauravas' father is the senior of the two patriarchs, Duryodhana, the eldest Kaurava, is younger than Yudhisthira, the eldest Pandava. Both Duryodhana and Yudhisthira claim to be first in line to inherit the throne.
When Bhishma asked for Gandhari's hand in marriage for his blind nephew Dhritarashtra, her brother Shakuni got furious. Though he agreed later, he swore to himself that he would destroy the Kuru race. He sowed the seeds of the climactic battle of Kurukshetra during the adolescence of the Kauravas and Pandavas by poisoning the mind of Duryodhana against the Pandavas. This results in the Kurukshetra War which produces conflicts of kinship and friendship, and instances of family loyalty and duty taking precedence over what is just.