Chico is a messy-looking young man, unable to approach his neighbor Clara. As days go by, Chico improves his appearance and his confidence grows progressively, motivating him to take the first step with Clara. After a romantic evening between them, Chico approaches Clara, who is confused and denies that they were involved. Chico is then forced to confront his reality, with a series of terrifying visions that lead him to Clara's apartment. As he walks through this threshold, he finds the darkest corner of his mind, something so perverse that it proves his madness...