Act 1
At the Crusoé family home in Bristol, Lady Crusoé, her niece Edwige and Suzanne, the maid, prepare for Sunday tea, while Sir William pointedly reads aloud the parable of the Prodigal Son from his Bible. Robinson finally arrives disgracefully late, but, a cherished only child, he easily persuades his parents to forgive him. Taking Toby aside, he explains that he has booked passages to South America for them both that very night on the schooner in the harbour. Edwige, realising that she is in love with Robinson, begs him to stay. He is tempted to remain, but she realises she will lose him if he forgoes his dream for her sake. Toby withdraws from the venture – at Suzanne's insistence – but Robinson knows he has to go alone to seek his fortune.
Act 2
Six years later, Robinson is on a desert island at the mouth of the Orinoco, having escaped from pirates who attacked his ship. He has only one companion, Vendredi, whom he earlier rescued from being sacrificed to the gods by the cannibal tribe on the island. Robinson dreams of Edwige, and tries to explain his feelings to Vendredi.
In another part of the island, Edwige, Suzanne and Toby have arrived to look for Robinson. They too have been attacked by and escaped from pirates. Toby and Suzanne are captured by the cannibals, and meet their old Bristol neighbour Jim Cocks. He had run away to sea ten years earlier, and, captured by the cannibals, has become their cook. He cheerfully informs Suzanne and Toby that they will be the cannibals' dinner that evening. At sunset, Edwige is brought in by natives, who believe that she is a white goddess. She is to be sacrificed to their god, Saranha. Vendredi spies all this, and is smitten with Edwige. When the fire is lit, he fires Robinson's pistol, the natives flee, and he rescues Edwige, Suzanne, Toby and Jim Cocks.
Act 3
The next day Robinson discovers Edwige sleeping in his hut and they are blissfully reunited. Vendredi explains that the pirates have left their ship, allowing the English group the chance to seize it and to return to England while the pirates feast and dance. Robinson, feigning insanity, fools the pirates with a story of treasure buried in the jungle and they go off to find it, but are caught by the cannibals. Robinson wields the pirates' guns and the pirates plead to be saved. Robinson agrees, and all set sail for Bristol once again, with the pirate chief, as ship's captain, marrying Robinson and Edwige at sea.