Immediately after Susan Lane becomes Mrs. Richard Greer, she grows jealous when she sees her husband talking to Marion Starr, one of her bridesmaids. Susan's brother Phil wishes to marry Marion, but is entangled with actress Maizie Middleton. Consequently, Dick Greer agrees to see Maizie, whose troupe is playing Niagara, and attempts to buy her off.

Adventerous engineer Robert Clay, goes to a South American country on an assignment by rich American Ted Langham to open an iron mine. While Robert is there, the unscrupulous General Mendoza tries to convince him to divide the mine's assets between them and President Alvarez. Mendoza starts a revolution against Alvarez when he and Clay will not go along with the plan, but he eventually is defeated after a long battle. Clay then is able to pursue his relationship with Hope, Langham's daughter, who has accompanied her father to South America.