When ‘Lady’ Sandra Abbott (Imelda Staunton) discovers that her husband of thirty five years (John Sessions) is having an affair with her best friend (Josie Lawrence), she seeks refuge in London with her estranged, older sister Bif (Celia Imrie). Sandra is a fish out of water next to her outspoken, serial dating, free spirited sibling who lives on an inner-city council estate. But difference is just what Sandra needs and she reluctantly lets Bif drag her along to a community dance class where she meets her sister's friends, Charlie (Timothy Spall), Jackie (Joanna Lumley) and Ted (David Hayman). This colorful group of defiant and energetic third-agers start to show Sandra that retirement is a beginning, and that divorce could be her new lease of life and love.