Metalocalypse is a flash animated comedy that follows the exploits of a fictitious half American - half Scandinavian death metal band known as Dethklok. The band and its members are huge the world over, but incredibly stupid - a death metal version of Spinal Tap. Watch as they leave a trail of destruction and mayhem in their wake with their ear-melting onslaught of metal! The band enjoys a popularity level unheard of in reality, ranking as the seventh largest economy on Earth. The band's popularity is such that impressionable fans will do anything its songs tell them to, even if that means death, which is usually the case.
Toki falls head over heels for a girl he meets online. When things sour he tries to break it off and instead has to bear the brutality of being her date at her father’s vegan funeral in 110 degree heat. Meanwhile Nathan experiences the brutality of dating a performance artist. Murderface must attend a sexual harassment seminar after trying to match Skwisgaar's sexual prowess. Skwisgaar searches for his biological father.
Dethklok must experience the ultimate brutality of the Holiday season; spending time with their mothers. Meanwhile Murderface ringleads the ultimate Christmas special that ends up being backed by the Christian church. And a particular rock and roll clown makes a holiday appearance.
The members of Dethklok utilize a variety of potentially dangerous home remedies in a desperate attempt to avoid a visit to the doctor's office.
After a series of public relations disasters, Dethklok joins a tribute band so they can get back in touch with their roots all while dealing with the issues of being a completely unknown band.
Believing Ofdensen is dead, Dethklok is forced to become their own managers while dealing with repairs to the destroyed Mordhaus and trying to plan their biggest concert to date. Their efforts are stalled however when a past acquaintance cuts off their unlimited financial freedom to get revenge against the band.