Oz moves to destroy the remnants of the Alliance military, and makes plans to reconcile with the colonies. Quatre and Duo decide to head for outer space to warn the colonies of Oz"s conspiracy, but the colonies that had once been their homes declare the Gundams their enemies. After an intense battle in space, Duo is defeated and taken prisoner by Oz. Heero searches for Duo to silence him, however, with the development of Oz"s newest mobile suits, Heero must confront Trowa in order to stop the production of these new weapons for war.