When glamorous Emily French (Kim Cattrall, Sex and the City) is brutally murdered in her home, all the evidence points to French's young lover, Leonard Vole (Billy Howle, On Chesil Beach), to whom the heiress left her fortune. Ms. French's devoted housekeeper (Monica Dolan, The Casual Vacancy) proclaims Leonard's guilt, but Leonard insists that his wife, enigmatic chorus girl Romaine (Andrea Riseborough, Bloodline, Birdman), can prove his innocence. As the scandalous crime goes to trial, solicitor John Mayhew (Toby Jones, Detectorists) finds that the case may be his undoing.