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The band has created a back-story set in a fictional area based on a mixture of Victorian England and American Old West, with the band members taking on alternate identities that relate to that back-story. In character, the band members are time travellers who have come from that past using one of Professor Mangrove's amazing inventions. Most of their songs are set in and tell stories about this fictional 19th century place, sung from the points-of-view of characters like "Clive the Barker", "Dread Penny" and "Elwood Lovekraken".A page on their website contains "The Unextraordinary Encyclopedia", a list of names, places and events in this fictional world that are referred to in their music.
Unextraordinary Gentlemen is a steampunk musical group. Its name is a reference to The League of Extraordinary Gentlemen film and comic book series. UXG has been called one of the "foremost of the musical assets of steampunk."