Demonium (2001)

Rasmus Bentley and his lover, Maria, are quickly climbing the ladder of success. One afternoon, after the closure of a deal which will secure their lives together forever, a terrible turn of events occurs. One year earlier, an eccentric scientist is brutally murdered in his sprawling ancient castle. His notary, Rasmus, calls together the man's heirs listed in his will, but as they all gather at the castle, they fail to realize that the murderer is still haunting the ancient halls. One by one, the group is methodically hunted down by the lunatic, whose vicious bloodbath is far from complete... The fates of Rasmus and Maria have been foretold, but how did this madness begin?