A small aircraft is forced down on a derelict Hebridean island, all marshes and cliffs and crevasses while it is tenanted by a very primitive people with Norse-Gaelic-Celtic speech and folkways. One of their small number disappears and they search and search for him until they find him on a strip of sand -- with significantly bloodshot eyes. The story is just enough to support the unnatural-supernatural elements which give it its character without, it must be admitted, really frightening you to death. The tone is too agreeable for that.