This episode is a flashback to how Jonny met Hadji. Dr. Quest was lecturing in Calcutta and survived an assassination attempt, thanks to Hadji. The beginning of a beautiful friendship! But why was Quest targeted? Well, turns out some sheep herders in the mountains have been getting sick, and Quest suspects a nerve gas of some kind. Naturally, the bad guys don't want him investigating. They even go so far as to attack by plane but an old friend of Hadji's named Pasha Peddler arrives to help out. Pasha is a merchant and is Indian, apparently, although he speaks with an American accent?
Pasha helpfully has a helicopter, so they manage to get into the snowy mountains where they find a strange door in the side of a mountain. Yeah, that's unusual. Dr. Quest and Race go to check it out, but unfortunately Dr. Quest falls down the mountainside in an avalanche and gets captured. He seems to get captured a lot, I've noticed. So now Race has to sneak into the secret facility to get him out. With some help from Hadji's friend he gets in and we have the usual hijinks, including a fairly intense gunfight. I love how in this cartoon they're not shy about the bad guys buying the farm in interesting ways!
The secret facility is kinda neat, with the bubbling vats of nerve gas and all that. And we have a race on skis to close this one out, with Dr. Quest's ingenuity and scientific gadgets providing a solution, as always.