The peaceful life of the residents of the coastal urbanization of Belmonte changes radically the day a sex video of Macarena, a school teacher, and Iván, one of her adult students, appears on the networks. This event shakes the lives of all of them, especially Macarena, who is repudiated by her family and neighbors, including Ana, her best friend and Iván's mother. Things in the town get even more complicated when the lifeless body of one of Belmonte's inhabitants appears on the cliff. Whose body is it? Does this death have something to do with the sex video of the teacher and the student?

Earth is an uninhabitable planet, and the ship Ark is the only place where human life remains the universe Young Valentina, raised aboard Arca since she was a baby, is destined to be fertilized as part of efforts to ensure the survival of the human species. Valentina will desperately search for answers and a way to escape her fate.

Carles, Pau and Dante meet at the funeral of their friend Tolo. They soon discover that a mysterious briefcase is related to their friend's death. Violence, lies and bizarre situations revolve around this briefcase and the protagonists of "408".