Pantherion (2012)

The secret NGO "Pantherion", located deep within the castle mountain of Graz, Austria, a small low-budget-organization for detecting, fighting and researching trans-dimensional threats, tech and/or beings has to face a wave of intruding life-force-vampires from another reality after saving the young student Viola from being killed. Plus, the sinister Thule-society invocates lovecraftian monsters from beyond the stars and everything turns and shifts into a strange direction...