"When it feels like you no longer have a pair, it's time to shake it up."

At 57, Gary Ingber walks away from the software company he founded to pursue a childhood dream of climbing the Himalayas and searching for a mythical Shangri-La.

Against the backdrop of a country convulsing with civil war, this is a soul-searching journey to the Everest region of Nepal, a tribute to a friend's dying son, and a father's love story to his own son.

"When you hear the siren of the wild, answer the damn call."