Under Ground

THEY'RE TRAPPED FIFTY FEET DOWN . . . AND SOMEONE WANTS THEM SIX FEET UNDER

The Sanctum is a luxurious, self-sustaining survival condominium situated underground. It's a plush bolt-hole for the rich and paranoid - a place where they can wait out the apocalypse in style. When a devastating super-flu virus hits, several families race to reach The Sanctum. All have their own motivations for entering. All are hiding secrets.

But when the door locks and someone dies, they realize the greatest threat to their survival may not be above ground - it may already be inside . . .

'It's J. G. Ballard meets Agatha Christie, with a soupçon of Patricia Highsmith thrown in . . . [Grey] ramps up the tension to an almost unbearable level, and ends with a stunning double finale'
Guardian