Duke Fleed's story continues in this long-awaited sequel to the seminal Mazinger Mecha franchise After being placed into hiding, UFO Robot Grendizer is humanity's only hope to stop an alien invasion. The war between the forces of Vega and Grendizer is but a distant memory. After Duke and Maria returned to the planet Fleed, Hikaru and Koji struggle to lead a normal life without the need for war. But Peace cannot last forever...