Lieutenant Duval does not shun any means to procure money, not even treason. He acquires some very important papers, which he disposes of to an agent of a foreign country. For the money thus obtained he intends to go abroad, and he makes his sweetheart, Miss B. who is cowed and unhappy, promise to go with him. Another officer, Mr. Joubert, who loves Miss B. discovers his treason, catches Duval in a new theft and has him arrested. As Miss B. learns of this, she decides to save him from prison and then to lake leave forever of the man whom she now absolutely despises. The treasoner’s escape is soon discovered, however, and Joubert, following him on horseback, soon overtakes him and they have a mortal encounter, with the result that Duval is slain. Joubert goes back to tell Miss B. about the death of her former sweetheart, and after the first shock is over she feels a great relief in being free, and Joubert declares his love, which she accepts and returns.