A seafaring man recounts his long struggle to survive after a shipwreck strands him on a remote island. He salvages supplies, fashions tools and shelter, cultivates food, and adapts European techniques to establish a solitary household. Over years he records daily routines, religious reflection, and practical inventions, and he fortifies against occasional threats. Discovery of visiting cannibals leads him to rescue a native whom he names Friday and to instruct him in language and faith. Together they defend against raids and eventually secure passage off the island, concluding a narrative of endurance, improvisation, and cultural encounter.