The protostellar phase is an early stage in the process of stars formation. The molecular cloud is initially balanced between gravitational forces, but then grow to collapse. The name refers to the young age of the protagonists and the fact that they all possess, in different ways, extraordinary minds. This seems to be a great advantage and they are supposed to have the brightest future, but slowly the story explores the dark sides of such apparent brightness. It is the story of an education, intellectual and sentimental, of a girl and two boys of the italian high bourgeoisie. Three young people, whose paths are inevitably bond to one another's, building a world of their own, far from the heaviness of social expectations. But this charming elitism that make them look like stars to the eye of others will eventually bring terrible consequences into the lives of the three friends.