The film begins with a radio announcement about a new state-of-the-art sanatorium designed specifically for insomniacs, offering treatment for those unable to sleep.

A group of men, each with peculiar reasons for their sleeplessness, signs up for the program, not necessarily to cure their insomnia but for a break filled with relaxation, music, and the allure of a resort-like environment.

To teach them a lesson, the nurses send the group to an uninhabited island, housing nothing but a dilapidated fisherman's hut, which they present as a special sanatorium branch.

Initially, the men rebel, concocting outlandish escape plans involving rafts, swimming attempts, and even romantic manipulations of the staff.

Amid the chaos, one participant forms a genuine connection with a nurse, who eventually reveals the truth: they are not on an isolated island but on a peninsula, with the actual sanatorium just a few kilometers away.