At Grissel's gambling house, Edwin Swayne, man of the world, meets, falls in love with and marries Frances Bridges. An adventuress named Dado Scholl hears of their marriage and swears revenge on Swayne, with whom she is in love. Davidson, a young fellow of about Frances' age and a great friend of Swayne's, loses all of his money at the gaming table; Swayne decides to give him a home to help him get on his feet again. Under the same roof now and mutually attracted to each other, Davidson and Frances become lovers. During a quarrel between Swayne and Davidson, Swayne is shot and Davidson is arrested for the crime. But the valet confesses that he shot his master at Dado's request; Swayne dies, content in the knowledge that Frances' future is safe in the hands of Davidson.