In 1980s Norway, teenager Øystein Aarseth, known as Euronymous, dreams of making a name for himself in the underground black metal scene. He forms the band Mayhem, creating a new, darker, and more chaotic sound that challenges societal norms and extremism. Euronymous opens a record shop called Helvete, which becomes a central hub for black metal enthusiasts. As the band gains notoriety, they push the boundaries with shocking stage performances and controversial declarations, aiming to invoke fear and rebellion.

Euronymous's vision starts to spiral out of control with the introduction of a new member, Varg Vikernes. Varg's extremist views and violent actions escalate tensions within the group and the scene. The pursuit of authenticity and the desire for infamy lead to increasingly dangerous behavior, sparking a series of tragic and violent events. The bonds between band members deteriorate as ideologies clash and egos inflate, highlighting the destructive nature of their quest for darkness and the true cost of their revolution. Ultimately, the intense rivalry and radical actions yield dire consequences for everyone involved.