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...

Guille is facing a complicated weekend. His girlfriend, Sonia, has dragged him to her hometown to celebrate her brother's birthday and finally meet his future in-laws. Guille isn't thrilled about the idea, especially since he's vying for an important promotion at work that weekend.