Metal Lords follows teenagers Hunter and Kevin as they struggle to fit in at their US high school. While their classmates are listening to Ed Sheeran and Justin Bieber, Hunter and Kevin and rocking out to heavy metal classics by Black Sabbath and Anthrax.
Music also provides an outlet for Hunter to vent his rage against bullies at school and his disinterested dad. Together, the boys form a group to take part in a Battle of the Bands contest, recruiting talented cellist Emily as bass player. Can they convince their fellow students that metal is cool?