It was just a small, ordinary seaside town. But then strange things began to happen ... A strange, eerie feeling began to make itself felt among the people. Footprints appeared in the sand. Gates were opened as if by an invisible hand, furniture was knocked over ...
But these were only the forerunners. The ghostly appearances grew and spread, and then the deaths began. A full-scale invasion was in progress - from an enemy who could be behind you or by your side, but who never showed himself, even as a shadow.
And the one man who knew the secret of the invasion realized that things had gotten beyond his control.