Katrin, 22, a young version of Bridget Jones, is a bit too bold and cheeky but has a heart of gold. Her best friend Babsi is waiting aboard the cruise ship MS Aida for her lover in vain.
When Katrin goes to the ship to tell Babsi the bad news she has received and get her back on shore, she trips and falls from a walkway into a container and loses consciousness.
Away from port, the seasick Katrin awakens and is immediately delivered to the captain, where she again meets up with Babsi.
Declared stowaways, the two have no money with which to pay and are forced to work for their passage. While laboring as a cleaning woman, Katrin finds herself always running into the conceited and egotistical ship’s doctor Markus…the very last type of guy she wants to meet…