http://www.imdb.com/title/tt0875696/

In this tale based on the lost North Carolina colony of Roanoke Island the colonists are attacked by three wraiths. The acting governor tries to understand what is happening while the people are being killed off. Finally piecing together half remembered Norse legends and local Native American tales he realizes these are the spirits of 3 viking witches, trapped on the island with the colonists. Can they find a way to end the siege and survive the winter when even the forest is controlled by the wraiths?