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".

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.