Only days into the winter mining season, a regulator freeze up cuts off Shawn's air supply. Emily negotiates with Mr. Gold for season-saving coordinates. Vernon returns to the ice with an eye to buy Claim 16. The Kellys get on some gold.

Following the arctic storm that drove everyone to shore, Shawn embarks on a marathon dive, Kris unveils a diving relay with The Reaper's new diver Shaunna and Emily takes another desperate shot at TOMCOD gold.