At the End of the Spectra(2006)

Original title: Al final del espectro

After a traumatic situation that makes Vega become an agoraphobic person, she decides to live like a hermit in an apartment because of her father's recommendation. But some strange things start happening, she sees visions, and hears noises and voices. She starts to worry about the dark past of that apartment, and the bizarre obsession of her neighbor.