The film's plot follows the story of Paikea Apirana ("Pai"). The leader should be the first-born grandson – a direct patrilineal descendant of Paikea, the Whale Rider – he who rode on top of a whale (Tohora) from Hawaiki. Pai is originally born a twin, but her twin brother, as well as her mother, dies in childbirth. However, Pai is female and technically cannot inherit the leadership. While her grandfather, Koro, later forms an affectionate bond with his granddaughter, carrying her to school every day on his bicycle, he also condemns her and blames her for conflicts happening within the tribe.