Marta and Jaime are a childless couple who have opted for the peace and quiet of the countryside. Without any surprise, they take in a neighboring child for a few days. However, a nocturnal visit from a strange animal shakes the couple’s logical reasoning about the simple things in life. Could the child have something to do with that terrifying presence? One of the effects of fear is to disturb the senses, making things seem different from what they are, and so, little by little, a fantastic order is established, triggering the most irrational and violent reactions in them. In the end, nothing will be the same for them again.