Gitta Winter

At the behest of their boss, London private detective Charly Biff and his assistant Ingrid are supposed to relax on a cruise along the Adriatic coast. Even before the ship sets sail, Charly gets on the trail of drug smugglers in the port of Portoroz. He soon finds out that they want to transport "snow" on the vacation steamer to Italy and sell it there. And while the other passengers enjoy themselves - and some even discover love - Charly follows the crooks' trail.

Because factory owner's son and womanizer Karl Fischer is constantly avoiding his rich fiancée Almut, his father Waldemar sends the flighty little boy to Italy, where he is supposed to work in his future father-in-law's business and come to his senses. The business is a beach hotel where Karl, booked by the drunken janitor as "Carla", ends up in a triple room where two girls are billeted. Karl finds the woman of his life in the beautiful black-haired Karin.