Belzebubs is an animated sitcom about a perfectly ordinary black metal cultist family. Sløth is juggling his stay-at-home dad obligations with his lifelong dream of being a black metal rock star. His breadwinner wife, Lucy, is fed up with her job and their teenage daughter, Lilith falls head over heels for a perfectly normal boy in her class. Leviathan is the family's good-natured youngest child.