Three simple-minded fisherman brothers enjoy life. They get help from the young girl Sus, who manages the house and helps on the fishing boat. When the brothers get a good offer to borrow money for a hotel, they immediately take it. However, there is the shady contractor Gravenkop from whom they borrow the money. At the same time, people are smuggling into the city; cheap booze is in circulation. Sus, together with his friend Stille, tries to solve the crime.