Federation pilot Io Fleming and Zeon ace Daryl Lorenz face off across the Thunderbolt Sector, a debris field of wrecked colonies and warships crackling with electrical interference that scrambles mobile suit sensors. When Io gets his hands on a prototype Gundam, Daryl has to decide what he's willing to sacrifice to match it and protect his squad. This ONA plays out within the One Year War of the original Mobile Suit Gundam.