The three-piece band consists of Lars Erik Blokkhus (vocals, guitar), Tommy Elstad (bass) and Hasse Rønningen (drums), with assistance from supporting musician Glenn Hauger on accordion and flute.

Their repertoire includes Norwegian songs with a traditional twist, rock music elements and international appeal.

In 2011, the band entered the "Drømmelåta i Holmestrand" music competition, produced by TV 2, with their song "Drømmeland".

On 14 January 2012, during the annual Spellemannprisen in Oslo, Plumbo gained some negative attention after lead singer Lars Erik Blokkhus accepted the prize for best song, for "Møkkamann" (roughly translated as "Dirt man" or "Shit man").

He proceeded to make a remark, meant as a joke, to the dark-skinned hosts Tshawe Baqwa and Yosef Wolde-Mariam, members of the popular Norwegian duo Madcon, saying that seeing them he thought the song got a new name; Mokkamann (literally Mocha man).