BELOW ZERO is a thinking person's mystery horror. A scriptwriter, Jack the Hack, has writer's block and arranges to be locked in a slaughterhouse freezer until he comes up with a script. Believe it or not, scriptwriter Signe Olynyk tells me she also did this when writing the movie. On screen, the story is dramatised for us as Jack writes, so we have two on-screen narratives: Jack's world (think, Fargo) and that of the alter ego in his story (think Saw). As he considers various re-writes, the story within a story changes. But a third story is at hand: that from Jack's own psyche. His basic plot, surprise surprise, is someone accidentally being locked in a freezer, in a building owned by a serial killer. But, if you can stand back from the subsequent on screen gore, there's maybe time to work out what's really happening! This Kaufmanesque horror story keeps you on your toes all the way through. Signe doesn't recommend new writers try the freezer trick at home, but she does run a scriptwriters' workshop, Pitchfest (www.pitchfest.com), and invites any budding writers reading this to get in touch with her.