The Diva sets sail from Minsry, its preparations to assault the space fortress Ambat complete. However, in its path lies the E.F.F. fleet commanded by Guavaran, who have orders to capture Grodek as a mutineer. As the Diva halts, its path blocked, the U.E. attack. The Federation fleet, beaten back by the fierce U.E. assault, is unable to capture the Diva. The crew of the Diva must decide whether to seize the moment and escape, or rescue Guavaran's fleet and seal their own capture. Grodek, captain of the Diva, must make a crucial decision.