A Bullet Through the Heart (1966)

Robbed of his prized possession, an ancestral 18th-century stone villa in Palermo, Sicilian fallen aristocrat Marquis Francesco de Montelepre swears revenge against dangerous local gangster Rizzardi. But with the crime boss's cut-throats out for blood, the humbled young nobleman, the last of his clan, is forced to flee Italy to lie low in Greece and plan his vengeance. As undying hatred and decades-old vendetta motivate ruthless Rizzardi's gang leader Navarra to finish the unprotected noble off, Francesco's last hope to save his skin is to find a crucial witness to expose the mobster. However, Francesco is one, and Rizzardi's army is everywhere. And when violence rules, only bullets have the final say.