A rookie police officer’s first night at the station in a small Scottish town involves a mysterious car crash, a basement lockup filled with men harboring dark secrets, and a confrontation with her own terrible past.

I didn’t expect this to turn into a tale of cosmic revenge and retribution, with some insane violence thrown in; the movie takes some unexpected turns, and in the last half hour really ratchets up the tension (and flames). The glimpses we get of the characters’ secret crimes are tantalizing but never fully explained, which adds to the mysterious atmosphere. All in all, a grim but enjoyable film.