It is told in legend that whenever evil threatens the land of Hyrule a hero is chosen by the Goddesses to protect it. A hero has appeared throughout many generations to answer to the threat and it has been custom to clad the hero in the green and don the name Link.
This Link is an orphan of Hylian blood raised in the forest by the Great Deku Tree after his dying mother delivered him there from a burning Hyrule. But the boy was destined to leave the forest one day and fulfill his place as a knight of Hyrule. When Ganondorf broke into the Sacred Realms to take the Triforce for himself, it split into three pieces and Link was imbued with the power of one of the Triforce fragment: the Triforce of Courage. With that power he is the one person able to wield the Master Sword, the blade of evil's bane said to be crafted by ancient sages to hold the power to repel evil and is the only known weapon that can defeat Ganon and return peace to the land.