Lt. Robin Crusoe is a navy pilot who bails out of his plane after engine trouble. He reaches a deserted island paradise where he builds a house, finds an abandoned submarine with lots of gadgets that he can use, and also finds a marooned chimp from the US Space program and a native girl named Wednesday who was exiled by her father. Wednesday thinks Crusoe wants to marry her, and when her father arrives on the island to collect her and Crusoe refused to marry her, chaos ensues.
Navy pilot Lt. Robin Crusoe, on a routine flying mission, is forced to parachute into the Pacific. After drifting for days without food or water, he is washed up on a desert island. Mysterious footprints lead him to a beached Japanese World War II submarine where he discovers Floyd, an astrochimp that survived a misadventure in space. Joining forces, the pair make life more comfortable by building everything from a pagoda-style bamboo hut to a golf course. Then one day they are joined by a native girl whom Robin nicknames Wednesday. She explains that her tyrannical father, the chief on a nearby island, banished her for refusing to marry a man of his choice. Before long Wednesday is joined by other women seeking independence. Robin organizes them into an army, and when the chief and his warriors invade, the native suffragettes stage a freedom rally. Using equipment from the beached sub, Robin and Floyd make it appear that the island's stone idol is displeased with the chief and his men. As the women are celebrating their victory, Robin does a little dance with Wednesday; and when he learns that this ritual is interpreted as a marriage proposal, he and Floyd flee to the beach as a Navy helicopter comes to the rescue. The helicopter lands on a carrier to a hero's welcome.
