Penumbra

Marga is a highly motivated, arrogant and successful businesswoman from Spain on assignment in Buenos Aires, a city she hates and whose people she loathes. While in the Argentine capital on a day the whole population is waiting to view a rare solar eclipse, she must also find a new tenant for her family's decrepit apartment.
Rapidly losing her patience, she comes upon the mysterious Jorge lurking outside the front door, who informs her that he has a client willing to pay four times what she is asking in rent. There's just one catch - the paperwork must be signed immediately. As Marga waits to complete the transaction, several of Jorge's associates suspiciously appear at the apartment, and before long Marga discovers that their plan for the building and for her may mean a startling fate worse than death. (official distributor synopsis)