At the End of the Spectra(2006)

At the End of the Spectra is a psychological thriller following Vega, a woman who becomes agoraphobic after a traumatic event and retreats into her apartment on her father's advice. Isolated within four walls, she begins experiencing unsettling phenomena: strange visions, unexplained noises, and disembodied voices. As her grip on reality fractures, Vega grows obsessed with uncovering the apartment's sinister history while becoming increasingly wary of her neighbor's bizarre fixation with her. The film blurs the line between genuine supernatural terror and the manifestations of a fractured mind, leaving viewers uncertain what is real and what exists only in Vega's deteriorating psyche.