A man wakes up disoriented in his own apartment, and soon realizes that he is locked up and has no way out.

A group of students of the environmental engineering career go to the neighborhood of the Monday River to do a job, during the night they hear a scream, Viviana (the protagonist) witnesses a moment that will unleash an overwhelming situation in her life that will guide her At the origin of that cry, Barbara and Jose will encounter an abnormal situation that will lead them to seek help in pseudo-science, Viviana's parents will seek explanations for the strange events that circulate Viviana's life.