Ruth Wilson puts in a strong performance in 'Dark River', playing a young farmer who inherits her family's troubled legacy. She's good, but the film never completely escapes its "grim up north" sensibility, as a story unfolds of unmitigated harshness in a world inhabited only the by the terminally taciturn. One can credit the writers for not tossing in a throwaway romance; but without hope, it's hard to sustain the interest of the audience.