The Lighthouse at the End of the World

Vasquez, Moriz, and Felipe are the three lighthouse keepers stationed at the Staten Island lighthouse off the southern tip of Argentina.
Two of them are murdered by a band of newly arrived pirates led by one Kongre. Vasquez is the only survivor, and spends the several months until the dispatch boat Sante Fe is due to return, surviving off the pirates' hidden stores of food in a cave. After an American ship from Mobile, Alabama, the Century, crashes on the island due to the light being put out in the lighthouse by the pirates, he bands with the sole survivor of the wreck — First Officer John Davis — to stop the pirates from escaping into the South Pacific.
They manage to scavenge a cannon from the wreckage, and shoot the pirates' ship, the Maule, as it is about to leave the bay they are situated in. The shell only causes minor damage, however, and the pirates' carpenter is able to fix it in only a few days. The night before the ship is about to attempt to leave again, Vasquez swims to the Maule at its mooring and plants a bomb in the rudder. This causes, yet again, only minor damage, and is fixed in only one day. The next day however, Carcante, the second-in-command of the pirate ship, spots the Sante Fe on the horizon. Fortunately for the pirates, it will not arrive till night, and the Sante Fe can't possibly get into the bay without light from the lighthouse. This will give them the perfect chance to slip out and sail around the southern side of the island, which they know quite well by now. Vasquez and Davis, however, return to the lighthouse and turn the light back on. The troop of pirates tries to regain the lighthouse and kill the two, but they find the bolted iron door to the staircase too reinforced to break down. Kongre, the band's leader, orders Carcante and the carpenter to climb the side of the lighthouse and murder Vasquez and Davis at the top, but they are shot as soon as their heads peek over the banister. Kongre and the remaining pirates realize it is all over for them, and flee to the interior of the island. Most surrender afterward, a few starve, and Vasquez watches as Kongre commits suicide. Vasquez returns home with the Sante Fe after making sure the island is safe for the new lighthousemen.