Marie Kiernan

Miriam Lee is a young woman in New York who works hard for a living. Her life changes when she meets Joe Valdez, a handsome and ruthless gambler. After the couple is married Valdez opens an elegant gambling house and uses Miriam, who is nicknamed "the queen of the night", as bait to attract rich and gambling customers.

After her mother dies, a young girl is sent with her little sister to live with their aunt and uncle, who treat her terribly. The aunt and uncle run a show at the Panama exposition and turn her into a human butterfly.

Lisza Tapenko (Bara) is governess in the household of Prince Arbasoff (Charles Clary). After the death of his wife, Lisza and he become involved, but because of the difference in social station he refuses to marry her. Lisza's former lover, Vassya (Richard Ordynski), convinces her to join the revolution and she goes off to the group headquarters in Switzerland. But the prince's little boy begs to have Lisza come back, so he goes after her and marries her.