 Despite barely knowing each other, they conspire to pose as a young professional couple in order to meet the requisites of an advertisement for a relatively cheap flat in the distinctive building at 23 Meteor Street, Tufnell Park, which is owned by resident landlady, Marsha Klein.Also in the building is Brian Topp, an eccentric conceptual artist who lives and works on his various pieces in the ground floor flat.Frequent visitors are Daisy's best friend, Twist Morgan and Tim's best friend, Mike Watt, who ends up becoming a lodger after Marsha's daughter Amber Weary "flies the nest".