On a voyage to Europe, reformed criminal Anthony Trent seeks former war comrade "William Smith," the only person who knows his true identity. In England, Anthony discovers that Smith's real name is Arthur Grenvil, the son of the Earl of Rosecarrel. He also meets and falls in love with Arthur's sister Daphne. Upon learning that the earl is being blackmailed by Count Michael Temesvar, who threatens to expose a treaty between their two countries, Anthony embarks on a suicide mission to the Balkan States to retrieve the treaty, overcoming a myriad of deadly obstacles. Following Anthony's escape in the count's silver automobile, the earl rewards him with an Australian ranch and Daphne's hand.