In this prequel to the original ICE series (ICE: Volume 1), Cole Matai is a new recruit at the Montana branch of The U.S. Immigration & Customs Enforcement agency. While working a drug trafficking case with agent Ezra Delgado, they discover that terrorists have taken over a small town near the Canadian border. As the terrorist group prepares to launch a nuclear attack on the Pacific Northwest, Cole and Ezra must foil their plans against the greatest of odds. If you love action you'e(tm)ll love ICE: CRITICAL MASS!.