Edmund Caruthers, London barrister and gentleman, is frustrated his betrothed, the lovely Dolly Wycliffe, won't set a date to marry him.

Dolly loves Edmund, but she feels responsible for his dismissal from his law firm and his posh friends' open hostility toward them. Even his father is against the marriage because she's a shop girl. Edmund doesn't know how to convince her that her happiness is more important to him than status or wealth.

When a woman is found murdered in fashionable Mayfair, their two worlds collide. The victim is a shop girl and Dolly is determined to find the killer. Their engagement is broken when Edmund keeps a friend's secret from Dolly.

Will his devotion to her and the cause of justice be enough to convince Dolly to change her mind and set a date?