In the 23rd century, a hidden group called Shadow is taking over the world. To fight against Shadow, billionaire Midoriyama Rei creates a secret organization called Circus. When she can't find qualified pilots for Circus' main mecha, the Galvion, she cuts a deal with two convicts, Mu and Maya: they must lead the fight against Shadow and save innocents in exchange for years being cut from their long prison sentences. Source: Wikipedia Note: The show did not fare very well and had its planned number of episodes cut. A 23rd episode, then already partially completed, was never aired, and episode 22 had a 35-second epilogue tacked onto the end that explained the series' planned outcome via voice-over narration and stills.