Rose Bannerman is willing to save her family from ruin. Her twin, Millie, is far too sensitive to marry for convenience, so Rose must do so.

She has loved Perry, the Duke of Bentley, since the schoolroom, but he would never consider her for his bride.

When they become reacquainted, Rose finds the Duke arrogant and Perry considers her pert. He believes Millie is a more suitable match.

Rose takes Millie's place on a carriage ride and pretends to kiss him. Her intention is to embarrass him; she doesn't realize her impulsive action will compromise them both.

Perry is obliged to offer for her, an arrangement neither party is happy with.

Can Miss Bannerman and the Duke put aside their differences and make this arrangement work?