After the events of the first film, Finnish extreme metal band Impaled Rektum - consisting of singer Turo, guitarist Lotvonen, bassist Xytrax and drummer Oula - are incarcerated in a Norwegian prison.
Back in Finland, Lotvonen's father Pekka has a heart attack when he finds out that he needs to invest €30.000 in the family slaughterhouse, lest it be bulldozed; upon hearing the news, the band breaks out of prison, travels home, and contacts Fisto; Fisto says the Wacken slot has been filled, but offers the band a chance to prove themselves at a gig in Vilnius.
When during the gig, Bloodmotor's singer Rob is dragged off stage by fans, Turo climbs on stage and takes over, finishing the song; backstage, Turo makes a deal with an impressed Fisto to do anything to be successful, and Fisto gives a slot to the band at Wacken.
The band records a brutal death metal single they call "Prisoner of Flesh", but in absence of the band, Fisto and his studio engineer turn the song into a modern melodic deathcore track with electronic elements, re-titling it "To Die For"; when Turo finds out and expresses his distaste, Fisto offers him a choice between walking away with the promised €50.000, and playing Wacken.
They resort to collecting beer cans at the festival to earn the money, but notice Turo performing death metal acappella to also earn money; realizing he means well, they borrow some gear from Babymetal - who Xytrax bonded with over underground extreme metal - but as they're about to start playing a fundraiser for the festival crowd to earn money, an unhinged Dokken tries to shoot Turo with a gun handed to her by Fisto.