When her life is turned upside down upon discovering her husband's affair, Sandra Abbott seeks refuge in London with her estranged older sister Bif. She begins to find her feet again after letting Bif drag her along to a community dance class.

Imelda Staunton
as Sandra Abbott

Celia Imrie
as Bif

Timothy Spall
as Charlie Glover

Joanna Lumley
as Jackie

David Hayman
as Ted

John Sessions
as Mike Abbott

Josie Lawrence
as Pamela Harper

Phoebe Nicholls
as Janet

Sian Thomas
as Lilly Glover

Marianne Oldham
as Nicola