The Bithens, are beings living on the planet Bith, short for Bithrumcantrillion. They are an inquisitive, boring and somewhat annoying species. They have nothing better to do than critique alien worlds and lifeforms, going all over their local group galaxies. They seek out new things they can brag about, study groups to evaluate how other 'aliens' live, and debate amongst themselves endlessly, about what other civilisations should and should not do.

When they arrive 'as planned' near Victorian London in 1900, they discover an interesting world of contradictions... They also experience things that are 'alien' to them, such as sensibility, love and craft beers... Whilst taking in as much as they can and sobering up, the alien visitors underestimate the nosey and inquisitive nature of humans... being consistently out manoeuvred, taking them on an adventure that no human or alien will ever forget!