In an alternate reality, Fidel Castro uses genetic engineering to build the new man and thus save utopia. The experiment fails as these beings are highly intelligent but also cruel and uncontrollable. Rejected by their own creators, a group organizes a series of terrorist actions, and chaos reigns on the island. One of its members traces the origin of their genes and begins a journey to try to discover their humanity.

During summer in La Habana, four adolescents with physical problems, while in vacation from school, spend a day in a swimming pool with their apathetic instructor.