The beautiful Lady Venetia Brook who is at a Convent school in Paris is astonished when she is told by the Mother Superior she is to return home at once. When she arrives her father tells her he has sent for her because she is to marry the Duke of Rockinston in a fortnight‘s time. She is horrified at the idea and learns from her Godmother that the Duke, who is one of the most handsome and charming bachelors in London, has been caught red-handed leaving the Countess of Darran‘s house at three o‘clock in the morning.