When the family Simonsen move in its of the erotic family Thamms, seeing his son Thomas a very different life. Thomas attracted by siblings Michael and Topsy. Thomas traveling with family on vacation, where he is experiencing moral decay. All about family Thamms contrary to his parents' basic concepts: nude bathing in the sea, a young couple who openly go to bed with each other in the dunes, Mikael night in an elderly woman, etc. Finally, when Thomas surrenders, pops his parents unexpectedly up in the dunes. Back in the villa, Thomas no longer conform to the parents' morals, but begins to rebel.