1920s London. A shocking murder has stained the plush carpets of a handsome London townhouse. The victim is an older woman, the enormously rich Emily French. All the evidence points to Leonard Vole, a young chancer to whom the heiress left their vast fortune and who ruthlessly took her life. At least, this is the story that Emily's dedicated housekeeper Janet Mackenzie stands by in court. Leonard however, is adamant that his partner, the enigmatic chorus girl Romaine, can prove his innocence.