"The ravens are coming for you. They're going to tear your eyes out..." Andy's recurring nightmares aren't going to stop him going on an advanced canoeing course at creepy Greystone Grange.

Even when Jack, the obnoxious trainee instructor, starts sniffing around Kate like the ravens that circle menacingly overhead, Andy is determined to prove himself both in and out of the river.

But events turn sinister as the Raven Rapids prove treacherous, a mad axeman is on the loose, and Jack seems to have it in for him...