"Berenice" is a short horror story by Edgar Allan Poe, first published in the Southern Literary Messenger in 1835.
Plot summary:
The narrator, Egaeus, is a studious young man who grows up in a large gloomy mansion with his cousin Berenice. He suffers from a type of obsessive disorder, a monomania that makes him fixate on objects. She, originally beautiful, suffers from some unspecified degenerative illness, with periods of catalepsy a particular symptom, which he refers to as a trance. Nevertheless, they are due to be married.
One afternoon, Egaeus sees Berenice as he sits in the library. When she smiles, he focuses on her teeth. His obsession grips him, and for days he drifts in and out of awareness, constantly thinking about the teeth. He imagines himself holding the teeth and turning them over to examine them from all angles. At one point a servant tells him that Berenice has died and shall be buried. When he next becomes aware, with an inexplicable terror, he finds a lamp and a small box in front of him. Another servant enters, reporting that a grave has been violated, and a shrouded disfigured body found, still alive. Egaeus finds his clothes are covered in mud and blood, and opens the box to find it contains dental instruments and "thirty-two small, white and ivory-looking substances" — Berenices teeth.
***Unlock this full story in Spanish and English, the terrifying music and a chilling HUMAN narration ONLY IN SPANISH with an In-App Purchase.