Set in gorgeous 1930s London, it sees downtrodden middle - aged governess Miss Guinevere Pettigrew (Frances McDormand) on the brink of destitution unless she can bag a long - shot job as PA to a dizzy, glamorous young, mink - for -
brains nightclub singer Delysia Lafosse (a perfect Amy Adams)-- whose main talent lies between her own satin sheets.