A remote Highland castle. A dark and stormy night. A murder most haunting.

It's Halloween, and when an elderly billionaire is discovered dead in the locked study of his stately Highland home, DCI Jack Logan and his team must race the worsening weather to get to the scene of the crime.

There, among the victim's extended family and staff, Jack finds no shortage of suspects. Everyone, it seems, had reason to want the old man dead, and they all have something to hide.

Cut off from backup by the worst storm in decades, and with the cast and crew of a TV ghost-hunting show seriously cramping his style, Jack's only chance of solving his latest case is by going back to basics.

But the castle's residents won't give him a minute to think.

Not even the dead ones....