
"Once you get in, you can't get out."
Four teenagers at a British private school secretly uncover and explore the depths of a sealed underground hole created decades ago as a possible bomb shelter.
Liz Dunn

Mike Steel

Frances 'Frankie' Almond Smith

Geoff Bingham

Dr. Philippa Horwood

DCS Tom Howard

Daisy

DI Chapman

Martyn Taylor

Minnie (as Gemma Powell)

Mrs. Dunn

Gillian

Policewoman
Solicitor
Boy in School

Doctor

Reporter

Reporter
Reporter