Luis is a film score composer. He has only a few days to deliver his latest work, and time is running out. He spends day and night at the piano, barely sleeping. He knows that if he loses this opportunity, his career is over. The stress is mounting. But a strange feeling begins to creep over Luis; he thinks someone is watching him. Someone inside his solitary apartment. And perhaps Luis isn't as alone as he thinks...

On a stormy night, a woman caring for a sick elderly lady in an old mansion discovers a radio program about paranormal events. She must confront her deepest fears as she descends into the darkness of a night that seems to have no end.