Episode 1 introduces several key conflicts: Emma Barnett's contentious decision to proceed with a kitchen extension despite objections from neighbors Derek and Barbara, who refuse to sign the party wall agreement due to concerns about a 'precious tree'; tensions in Emma and John Barnett's marriage; Emma's strained relationship with her estranged father Terry, whom she involves to rush planning permission; and Emma's professional troubles involving a revenge-seeking police officer who blames her for wrecking her career. Additionally, there is a mysterious figure following Emma, adding a layer of suspense to the story.

The central characters introduced are Emma Barnett, a criminal defence solicitor; her husband John; and their daughter Beth. They live on Shelbury Drive and appear to have a contented life, though cracks in their marriage are evident. Neighbors Derek and Barbara oppose Emma's extension plans, while another neighbor, Sonia, seems supportive, particularly towards John. Emma's estranged father Terry is also introduced as a wheeler-dealer who becomes involved in the planning permission process.

The kitchen extension is a catalyst for much of the episode's drama. Emma insists on proceeding with the extension despite objections, which causes neighborly disputes, particularly with Derek and Barbara who refuse to sign the party wall agreement because of a 'precious tree'. The extension project spirals out of control, leading Emma to involve her estranged father to rush planning permission. This decision triggers tensions and sets off a chain of events affecting both Emma's personal and professional life.

Suspenseful elements include a mysterious figure following Emma, which may be connected to a revenge-seeking police officer who blames Emma for ruining her career. Additionally, there are hints of a past murder related to one of the houses on the street, as indicated by blood stains and a broken picture seen by a prospective buyer, though police activity is not evident until later in the series. These elements create an undercurrent of mystery and tension beneath the suburban setting.

Emma Barnett is portrayed as a stubborn and determined criminal defence solicitor who is willing to push ahead with her plans despite opposition. She is described as making 'Donald Trump look like a reasonable human being' in terms of stubbornness. Her decisions, such as insisting on the kitchen extension and involving her estranged father to expedite planning permission, suggest a strong-willed but possibly impulsive character. Professionally, she faces challenges from a police officer seeking revenge, adding complexity to her character's situation.