Willard has gone missing. He left Switzerland, against orders, in pursuit of a gold thief, and has disappeared in the Himalayas. Miss Mallard comes looking for her nephew but she finds more than she could ever have imagined: a mysterious hidden city, the yeti, a fountain of youth. All play a roll in Willard's disappearance and the theft of gold he was investigating. Miss Mallard solves the mystery and ensures the safety off all her new friends, including The Abominable Snowduck of the Himalayas.