Who ya gonna call?

From moviesonline, "A terrified man runs down a street, followed by something hidden in the darkness. He slams the door to his home, believing his is safe – but doors can’t keep this horror out. A ghoulish apparition suddenly appears, killing him in a most horrific way…

Sammy and Tom are paranormal investigators, trying to solve a case that has haunted Tom for years. Every year, he comes to Germany – and every year, he leaves empty-handed. This year, however, they run into Donnie, an old friend who informs them of an unsolved mystery that’s right up their alley.

Donnie’s American friend Sarah has been having nightmares. Her sister was brutally murdered and voices from beyond have drawn her to Germany, where she believes the answers must lie.
Teaming up with Sammy and Tom, the group tries to seek out answers to the murder – and the ghoulish deaths that are befalling citizens of this small German town. The people here know more than they let on… and no one can be trusted.

Friends become enemies – and the living become the dead… Who was responsible for the murder of Sarah’s sister? What secrets do the town’s mysterious strangers hide? What does the vicious phantom want?