Four Desperate Men

After escaping from prison, wrongly accused Matt Kirk (Aldo Ray) has a daring plan in mind: He'll use the artillery cannons at Fort Dennison, located on the island of Pinchgut off the coast of Sydney, Australia, to demand a retrial, or else he'll fire upon the city. However, this terrorist act brings police to the island, leaving Kirk and his fellow escapees to defend themselves. What law enforcement officials don't know is the threat is a bluff, as the fugitives cannot access the cannon shells.