Brilliantly scripted, atmospherically chilling and seat-edged suspenseful right up to its masterful shock ending, this hard-hitting psychological horror concerns a group of workers hired to clear an abandoned insane asylum of asbestos in one week. As the crew, all harbouring dark secrets of their own, is drawn deeper into the mysteries surrounding the imposing building - patient abuse, medieval medical procedures and demonic possession rumours - the gruelling pressures mount to complete their assignment. Soon an awful truth emerges, triggered by playing a case history tape marked "Session 9", and someone cracks under the murderous strain. Evocatively shot on High Definition Digital Video and graced by superb ensemble performances, especially from Peter Mullan and Josh Lucas, director Brad Anderson's cautionary tale of psyche-infection is a stunning success on every character-driven, grimly realistic and spine-tingling front.

Tensions rise within an asbestos cleaning crew as they work in an abandoned mental hospital with a horrific past that seems to be coming back.