Robinson Crusoe was a sailor. During one of his voyages he was shipwrecked in a storm and all his companions were drowned.
He reached a desert island and, before the ship sank, he succeeded in bringing ashore some tools, guns, food and also a cat and a dog. After living alone for many years, one day he saw some canoes approaching the island. He hid behind a bush and from there, shortly after, he saw some savages landing. They had some captives with them and Robinson realized that they were going to kill and eat them. Al of a sudden one of the captives ran away. Two cannibals pursued him and were going to catch him but Robinson fired at them and saved the captive. As all this happened on a Friday, Robinson named the savage he had saved Friday and took him as his servant. Robinson taught Friday to speak English and baptized him.
The two men lived together on the island until a ship anchored off shore. The crew had mutinied and were going to kill their captain. Robinson and Friday saved him and so they were able to leave the island.