Miriam Gibson is seduced by a handsome adventurer who then abandons her and their child to marry for money. Penniless she becomes a prostitute to care for her child but when the baby dies a hopeless Miriam goes to London becoming the housekeeper and eventual mistress of barrister Geoffrey Sherwood. Jilted by his fiancée Valentine, who likewise married for money, Sherwood has become an alcoholic. As Miriam and Geoffrey grow closer, she hopes for marriage, but when an unhappy Valentine begins to trifle with Geoffrey, he responds and discards Miriam until he realizes Valentine’s shallowness versus Miriam's kindness and consideration for others. They marry in a little Scottish kirk, and sail for Buenos Aires to begin a new life.

Helene De Travillac, a sweat little French girl, loves her handsome cousin, Andre D'Eguzon, but a scheming aunt has engaged her to Valentin LeBarroyer, a methodical, statistic-loving "stick," but wealthy. On the wedding morning Andre suddenly appears on the scene and pleads with Helene. She hesitates, a little, tears off her veil and flees with her lover to her old home in the country. There her grandmother makes the natural mistake of thinking Andre is the husband. The resulting complications are amusing. Finally arrives the discarded Valentin, hunting for his bride. When he dins her he proves himself a man, and "The Beautiful Adventure" ends happily for the lovers. This film is presumably lost.

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