The stories of the residents of a large house in Manchester that is divided into four flats. Gail, who is married to Henry, is about to celebrate her 70th birthday when a chance encounter throws her whole life into question. David is happily married to Kelly, but is conflicted by temptation when he meets the impulsive Saira on holiday. Pilates teacher Belle's neatly ordered life is disrupted by the unexpected arrival of her chaotic 15 year-old niece Maya. Heavily pregnant Hannah - who is happily coupled up with safe and stable Liam - has her plans upended by the return of Andy, with whom she had a passionate one-night stand nine months previously.