U.C. 0079, at the end of the One Year War. The Principality of Zeon, seeking independence from the Earth Federation, has been repeatedly throwing newly developed weapons and mobile units into the battlefield. At first glance they seem spectacular, but a cruel reality lurks in the background. The members of Zeon's 603 Technical Evaluation Unit field test the latest weapons and put new prototypes into action as the Zeon forces rush towards their final battle, and Zeon approaches the brink of defeat.