Haven

In seventh-century Ireland, a priest has a dream telling him to leave the sinful world behind. Taking two monks with him, he travels down the Shannon in search of an isolated spot on which to found a new place of worship.

Drifting out into the Atlantic, the three men find an impossibly steep, bare island inhabited only by birds, and claim it for God. But in such a place, far from all other humanity, what will survival mean?