Grim. Dreary and grim. As grim as any trench in World War I, where the entire film is set. We spend four days with a British unit about to be overrun by the Germans in the spring 1918 offensive. There is no story arc, just the pitiful and doomed interplay between several officers. War remains hell.
Mostly well acted, and in particular, Paul Bettany stands out as a doomed and comforting older officer, but that’s about it. This is a hard slog, though, mercifully short.