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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.

"Once you get in, you can't get out."

Credits

Thora BirchLiz Dunn

Desmond HarringtonMike Steel

Keira KnightleyFrances 'Frankie' Almond Smith

Laurence FoxGeoff Bingham

Embeth DavidtzDr. Philippa Horwood