Having escaped an underwater Czervenian facility, CPT Reed and SSG Dixon rush vital Intel to Special Agent Barfield revealing "Rostov" is a weapons program of incomprehensible and destructive power. Fueled by science thought to be only theoretical, the weapon is so powerful it could start a chain reaction of unknown consequences on a scale never seen. Unprecedented circumstances now force the Mustangs to devise an extraordinary mission that, if successful, could save hundreds of thousands of lives in America's Army Issue #12 - Crescendo.