After he is orphaned by an air raid on Port Said during the Suez Crisis, a young boy attempts to go by himself from the Suez Canal to Durban in South Africa where his nearest relative, Aunt Jane, lives. On the way he meets a variety of different people who help or hinder his journey - including an ageing diamond smuggler.

The poor, elderly—and the wily, when it comes to parting those who can afford it from their money—Scottish skipper of a broken-down old 'puffer' boat tricks an American tycoon into paying him to transport his personal cargo. When the tycoon learns of the trick, he attempts to track down the boat and remove his possessions.