In Universal Century 0090, after the end of the One Year War, three members of the Federation Survey Service; Rimia Greenwood, Led Wayline and Ashley Brown Brandon are charged with collecting data on various mobile suits that will bring the dark parts of the end of the One Year War to light. Among their subjects of interest are Kycilia Zabi's ace pilot-only Chimera Corps, and the Zeon ace pilot Johnny Ridden. One mystery, however, is that Led has no idea who he is. But as the time passes by, he gets some dreams of his ties with Johnny Ridden.