The Archimedes' principle faces the weight of a body submerged in a liquid with the push to the outside. If the weight of the body is greater than the thrust, the body will sink; if it's the same, it'll remain submerged and, if it's better, it'ill surface.
So that's what happen with the problems of the characters, some of them will be immersed in the darkest while other ones begin to see the light: Jorge has nothing to lose and the only thing he looks for is a way to move forward. Meanwhile, Pedro's increasingly disgusted with the his lifestyle. Pablo receives the visit of Luis's father again, who will urge him to ask Sergio a question that will change everything. Javier struggles to discover the truth about what happened to Luis. Marcos will have to face David. Oblivious to all these events, Luis and Nicolás strengthen their friendship.