An Adventure in Hearts: American agent Captain Dieppe gets involved in the affairs of lonely Count Fieramondi in Northern Italy. Dieppe, hired to help the count reconcile with his wife who has gone to Rome to pay off gambling debts mistakenly falls in love with her cousin, Lucia, who is impersonating her. After Dieppe retrieves evidence of the debts and the real identities are revealed, he makes a final sacrifice to ensure the count and countess can reunite.