Universal Century 0079, in the midst of the One Year War and in preparation for "Operation Star One", the SCVA-72 Thoroughbred and its crew are tasked to intercept a Zeon supply route behind the Moon that leads to the Space Fortress Solomon. To accomplish this, the Thoroughbred has been assigned two Gundams, the RX-78-4 Gundam Unit 4 "G04" and its brother unit the RX-78-5 Gundam Unit 5 "G05" piloted by Luce Kassel and Ford Romfellow respectively.

Note:

• The series was later recompiled (alongside all other Matsumoto's Gundam-related titles) within a new 3 volumes Shinsouban edition, now labeled as Mobile Suit Gundam Gaiden REBELLION: Space, at the End of a Flash... with new additional feautes.