Gently to the summit

Mountaineer Reginald Kincaid disappeared during an expedition to climb Mount Everest. His body was never recovered, lost on the mountain slopes like so many other casualties of the quest for the world's highest peak - so it comes as a shock to his fellow climbers when he turns up again 22 years later. Is this man really Kincaid? How could he possibly have survived? The mystery invokes suspicion when Kincaid's climbing partner on the Everest attempt, Arthur Fleece, falls to his death on Mount Snowdon...