Helena stops her van in an old quarry on the outskirts of the city. Looking nervous, she takes out of the trunk the body of an enormous man and gets ready to bury him. She struggles to clear the evidence but in her world nothing is that easy and problems always come back.
Sergio is a teacher at the University. He is having a secret relationship with Carla, one of his students. Today Sergio canceled an exam and skipped class because he has to talk to her and offer her something very special.
A group of people move through a labyrinth of tunnels in the urban underground. They cut through the darkness with the multiple flashlights strapped to their bodies. During their journey, they'll have to face the dangers that lurk in the darkness and, what is worse, themselves.
