The sailor Axel Nord is asked by his captain to do him a favor before his leave begins. Captain Rundholm wants him to give a letter to his niece in Stockholm. As Nord discovers, it isn't easy to find somebody you never have met, and it isn't made easier by the fact that some crooks believe that the letter contains evidence proving embezzlement in the shipping company.

Sjömannen Axel Nord uppmanas av sin kapten att göra honom en tjänst innan hans ledighet börjar. Kapten Rundholm vill att han ska ge ett brev till sin systerdotter i Stockholm.