Truck driver Ryan Reynolds is working in Iraq, but is kidnapped.

He wakes up buried alive in a coffin, bound and gagged with just a lighter, a mobile phone and a limited amount of air…

Playing on your worst nightmare, this heart-stopping thriller, superbly directed by Rodrigo Cortés, never loses its grip from its opening scene to its brilliant closing moment.

The film, shot in just 17 days, focuses entirely on Reynolds and his predicament as he desperately tries to call for help.

It’s compelling, clever film-making and Reynolds’ tour de force does it full justice.

This film starts at 12.25am on BBC1 Northern Ireland.