A police inspector tracks a notorious jewel thief, 'Diamond-Lasse,' to a hotel filled with eccentrics.
Theatre director Freddy Alsterberg has failed with his latest operetta. He decides to work his way over the Atlantic. His niece Tusse also stows away on the ship disguised as a boy.
A motherless child has a tumultuous existence, but she eventually becomes a famous international opera singer. Past and present meet when she performs in her original home town.
