Howl of the Underdogs is the story of the Norwegian metal band Madder Mortem and their singer who, struggling with a life-long eating disorder in an image-obsessed industry, undergoes weight loss surgery to battle the demons that have given birth to their music. After filming with the band during their 20th anniversary year as they recorded new music, toured Europe, and reunited all of their former members in Oslo for a once-in-a-lifetime show, the film explores how the band boils down their internal demons, Scandinavian cultural norms, and an image-obsessed industry into inspirational music that reaches fans around the world.