Director Roland Joffé (The Mission) and cult writer Larry Cohen (Phone Booth) have both done far better work than this psycho-thriller copycat of Saw, but still drum up a fair number of shocks. Supermodel Jennifer Tree (Elisha Cuthbert) wakes up in a customised cellar after being kidnapped by a serial killer. She's not alone, though, as in an adjoining cell is the equally dazed Gary (Daniel Gillies). As the unseen maniac plays sadistic cat-and-mouse games with the duo, the full horror of the situation hits home when they fall in love. Despite a well-telegraphed twist and the gory action turning more conventional, the pace never flags and the increasing daftness fails to become an issue. Joffé's interest clearly lies in society's obsession with celebrity rather than the nuances of the genre, but Cohen's precision script succeeds in keeping him on the terror track.