My first guess on this film is that it is going to end up being a "Sixth Sense" type film and we are going to find out that Detective Paul Grunning was the victim lying on the floor. But seeing as how this trailer gives away very little in that regard, who knows?
TrailerAddict.Com, which provides the trailer, also gives this short description of the film:
Still reeling from a personal tragedy, Detective Paul Grunning is sent on a routine call to a local professor's home. When things turn deadly, he must navigate a fractured reality to solve the mystery before it's too late.
Watch this trailer and come to your own conclusions. Fissure opens in theaters on May 15, 2009.