The Ferryman

A group of young tourists charter a boat in the South Pacific Ocean for the holiday of a lifetime. They stumble upon an evil that demands vengeance at any cost. In the middle of the ocean and with no help coming, they discover that payment is due.

Out on a dead calm ocean, in a thick fog, a group of tourists on a pleasure craft are about to cross paths with an ancient and terrible evil. Sharing the same ocean, a sick, dying old Greek man drifts alone on a stricken yacht.
The Greek (John Rhys-Davies) has been cheating death for countless years. Trading broken bodies for new ones over centuries.

With him he carries a deadly weapon that allows him to do this. This weapon, the Shifting Blade, gives its possessor an awesome power.