A squad of British soldiers, training in an isolated Scottish glen, find lycanthropic action under a full moon. It's werewolves vs. hardware — and more than that, it's a gritty, naturalistic drama with relentless action and a band-of-brothers poignancy. An ensemble led by charismatic Brit tough-guy actors Sean Pertwee (Event Horizon, Soldier, Tales of the Mummy), Kevin McKidd (Tommy in Trainspotting) and Liam Cunningham (First Knight, the miniseries Atilla), plus can't-take-your-eyes-off-her newcomer Emma Cleasby, fleshes out a taut tale of blood 'n' guts — in both meanings of the term.