Welcome to the madness of sled dog racing, where staying up for days on end is sort of normal, and everyone cares so much about the dogs, that the mushers often get left behind and have to fend on broken bread sticks and candy bars.
The kids of the Sabaakax family have decided to enter The Last Great Race on Earth, the Iditarod, and as far as Socco, Natu and Dinahei are concerned, completing the race is a matter of the future of their happiness together as a couple who aren't.
MUSH! happens in a different universe to that of Summer Camep, so being a shifter is a matter of hereditary, whatever gender you are. These guys run in the same world as the pack from Born Wolf, but just on the other side of the planet. Pull on your gloves and booties people, it's winter in Alaska.