ONE VOICE tells the story of the Kamehameha Schools Song Contest through the eyes of the student song directors. Every year in Hawaii, 2000 high school students compete in the Kamehameha Schools Song Contest where young leaders direct their peers in singing Hawaiian music in four-part harmony. ONE VOICE shares the thrill of the competition via the personal stories of the student song directors as they experience the trials and tribulations of competition in this annual high school event. Following the elected student song directors, the audience sees how the tradition creates an indelible experience that builds class unity, instills cultural pride and builds character. The film also explores their world outside of school by meeting their families, or 'ohana, and revealing their hopes and dreams for the future. Through the stories and lives of these contemporary high school students, the audience will experience Hawaiian culture as it has survived, flourished and grown through the universal power of music and song.