Will's friends have been too busy with their girlfriends to notice how much he is struggling. After he and Mr. Clarke discover a mysterious map Bob left in a box of old nerdy memorabilia, Will rallies the crew to investigate--but with a blizzard coming, they're afraid to follow.

When Mike, Dustin and Lucas learn that Will has taken off into the freezing wilds alone they rush to stop him. When they all discover there may be more to this adventure than a fake treasure map, it's too late to turn back. They have no choice but to follow the clues further into an abandoned mine shaft full of booby traps and mystery.