Violence and nudism among teenagers

A group of children of different ages decide to live “in the wild” for a while. Having stolen and obtained equipment and food in a variety of ways, they set off to an uninhabited island somewhere in the North Sea. But having reached the place and happily settled down in the lap of nature, none of the guys bothered to properly tie the boat. Far from civilization and without adult supervision, boys and girls quickly turn into a pack of savages, in which the strong are always right, and those who are different from others become an outcast. And the island of paradise turns into an arena of tough and sometimes brutal confrontation.
The name of the movie: