A marvelous portrayal of a key event in British caving, and of the adventurous spirit of the two cavers famous for their numerous cave diving breakthroughs and records. Documenting a world record-breaking cave dive of 6,000 ft (1,800 m) made by Geoff Yeadon and Oliver Statham from West Kingsdale Master Cave, in North Yorkshire, England to Keld Head.

• Documentary