Surprised by a storm, the fishing boat of three valiant sailors departed from the coast. One of the men had been living on coastal shipping for ages, the second, a sturdy Visigoth man, had broken with his former life as a pirate, and the third had recently arrived on the fishing boat as a young sailor. But the ocean pushed them to an archipelago, from which the beam of a lighthouse emerged in the night, along with its frenzied speed. They landed on the coast of the smallest island, under a raging sea which had shattered part of the boat. The vision of the lighthouse lost on this islet did not enchant them, they had to go there, because no dwelling remained in that austere place. When they reached the door of the fire tower, a mishap made them ask many questions about a drama that took place there a few weeks earlier.