Filmmaker Jennifer Peedom was following the legendary Phurba Tashi Sherpa as he prepared for his record-breaking 22nd ascent of Mount Everest when the unthinkable happened: a deadly avalanche killed 16 Sherpas, and their community united in grief and anger to reclaim the mountain from the adventure industry that hires them to risk their lives. Through the voices of the guides themselves, their families, and the climbers poised to summit when the disaster struck, Sherpa chronicles a historic moment of tragedy and resistance in which the Sherpas and their families reconsider the spiritual, economic, and personal implications of climbing or not climbing Everest. Sherpa will air April 23 on Discovery Channel.